feat: 2025-11-25 review fixes (#201)

* fix: review fixes of the latest changes

* fix: updated unit tests

* chore: more conformance compliance improvements

* chore: reverted protocol changes

* chore: more compliance improvements

* chore: more conformance compliance improvements

* chore: improvements to the backcompat and updated to Tool unit tests

* chore: ci update
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yehorsobko 2026-03-03 16:33:28 +01:00 • committed by GitHub
commit 973b46b8f7
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5 changed files with 692 additions and 507 deletions

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@ -7,38 +7,10 @@ import Foundation
// MARK: - Reference Types
/// A reference to a prompt by name
public struct PromptReference: Hashable, Codable, Sendable {
/// The prompt name
public let name: String
public init(name: String) {
self.name = name
}
private enum CodingKeys: String, CodingKey {
case type, name
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode("ref/prompt", forKey: .type)
try container.encode(name, forKey: .name)
}
public init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
let type = try container.decode(String.self, forKey: .type)
guard type == "ref/prompt" else {
throw DecodingError.dataCorruptedError(
forKey: .type,
in: container,
debugDescription: "Expected ref/prompt type"
)
}
name = try container.decode(String.self, forKey: .name)
}
}
/// A reference to a prompt by name.
///
/// This is a typealias for `Prompt.Reference` — the two types are equivalent.
public typealias PromptReference = Prompt.Reference
/// A reference to a resource by URI
public struct ResourceReference: Hashable, Codable, Sendable {
@ -153,9 +125,9 @@ public enum Complete: Method {
/// Context containing already-resolved arguments
public struct Context: Hashable, Codable, Sendable {
/// A mapping of already-resolved argument names to their values
public let arguments: [String: Value]
public let arguments: [String: String]
public init(arguments: [String: Value]) {
public init(arguments: [String: String]) {
self.arguments = arguments
}
}
@ -164,9 +136,28 @@ public enum Complete: Method {
public struct Result: Hashable, Codable, Sendable {
/// The completion result
public let completion: Completion
/// Optional metadata about this result
public var _meta: Metadata?
public init(completion: Completion) {
public init(completion: Completion, _meta: Metadata? = nil) {
self.completion = completion
self._meta = _meta
}
private enum CodingKeys: String, CodingKey, CaseIterable {
case completion, _meta
}
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(completion, forKey: .completion)
try container.encodeIfPresent(_meta, forKey: ._meta)
}
public init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
completion = try container.decode(Completion.self, forKey: .completion)
_meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
}
/// Completion result containing suggested values

View file

@ -48,8 +48,8 @@ public struct Prompt: Hashable, Codable, Sendable {
try container.encodeIfPresent(title, forKey: .title)
try container.encodeIfPresent(description, forKey: .description)
try container.encodeIfPresent(arguments, forKey: .arguments)
try container.encodeIfPresent(icons, forKey: . icons)
try container.encodeIfPresent(_meta, forKey: . _meta)
try container.encodeIfPresent(icons, forKey: .icons)
try container.encodeIfPresent(_meta, forKey: ._meta)
}
public init(from decoder: Decoder) throws {
@ -58,8 +58,8 @@ public struct Prompt: Hashable, Codable, Sendable {
title = try container.decodeIfPresent(String.self, forKey: .title)
description = try container.decodeIfPresent(String.self, forKey: .description)
arguments = try container.decodeIfPresent([Argument].self, forKey: .arguments)
icons = try container.decodeIfPresent([Icon].self, forKey: . icons)
_meta = try container.decodeIfPresent(Metadata.self, forKey: . _meta)
icons = try container.decodeIfPresent([Icon].self, forKey: .icons)
_meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
}
/// An argument for a prompt
@ -136,6 +136,8 @@ public struct Prompt: Hashable, Codable, Sendable {
case audio(data: String, mimeType: String)
/// Embedded resource content (EmbeddedResource from spec)
case resource(resource: Resource.Content, annotations: Resource.Annotations? = nil, _meta: Metadata? = nil)
/// Resource link
case resourceLink(uri: String, name: String, title: String? = nil, description: String? = nil, mimeType: String? = nil, annotations: Resource.Annotations? = nil)
}
}
@ -176,6 +178,7 @@ public struct Prompt: Hashable, Codable, Sendable {
extension Prompt.Message.Content: Codable {
private enum CodingKeys: String, CodingKey {
case type, text, data, mimeType, resource, annotations, _meta
case uri, name, title, description
}
public func encode(to encoder: Encoder) throws {
@ -198,6 +201,14 @@ extension Prompt.Message.Content: Codable {
try container.encode(resourceContent, forKey: .resource)
try container.encodeIfPresent(annotations, forKey: .annotations)
try container.encodeIfPresent(_meta, forKey: ._meta)
case .resourceLink(let uri, let name, let title, let description, let mimeType, let annotations):
try container.encode("resource_link", forKey: .type)
try container.encode(uri, forKey: .uri)
try container.encode(name, forKey: .name)
try container.encodeIfPresent(title, forKey: .title)
try container.encodeIfPresent(description, forKey: .description)
try container.encodeIfPresent(mimeType, forKey: .mimeType)
try container.encodeIfPresent(annotations, forKey: .annotations)
}
}
@ -222,6 +233,14 @@ extension Prompt.Message.Content: Codable {
let annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
let _meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
self = .resource(resource: resourceContent, annotations: annotations, _meta: _meta)
case "resource_link":
let uri = try container.decode(String.self, forKey: .uri)
let name = try container.decode(String.self, forKey: .name)
let title = try container.decodeIfPresent(String.self, forKey: .title)
let description = try container.decodeIfPresent(String.self, forKey: .description)
let mimeType = try container.decodeIfPresent(String.self, forKey: .mimeType)
let annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
self = .resourceLink(uri: uri, name: name, title: title, description: description, mimeType: mimeType, annotations: annotations)
default:
throw DecodingError.dataCorruptedError(
forKey: .type,
@ -250,7 +269,7 @@ extension Prompt.Message.Content: ExpressibleByStringInterpolation {
// MARK: -
/// To retrieve available prompts, clients send a `prompts/list` request.
/// - SeeAlso: https://modelcontextprotocol.io/specification/2024-11-05/server/prompts/#listing-prompts
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/prompts/#listing-prompts
public enum ListPrompts: Method {
public static let name: String = "prompts/list"
@ -267,9 +286,9 @@ public enum ListPrompts: Method {
}
public struct Result: Hashable, Codable, Sendable {
let prompts: [Prompt]
let nextCursor: String?
var _meta: Metadata?
public let prompts: [Prompt]
public let nextCursor: String?
public var _meta: Metadata?
public init(
prompts: [Prompt],
@ -303,15 +322,15 @@ public enum ListPrompts: Method {
/// To retrieve a specific prompt, clients send a `prompts/get` request.
/// Arguments may be auto-completed through the completion API.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2024-11-05/server/prompts/#getting-a-prompt
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/prompts/#getting-a-prompt
public enum GetPrompt: Method {
public static let name: String = "prompts/get"
public struct Parameters: Hashable, Codable, Sendable {
public let name: String
public let arguments: [String: Value]?
public let arguments: [String: String]?
public init(name: String, arguments: [String: Value]? = nil) {
public init(name: String, arguments: [String: String]? = nil) {
self.name = name
self.arguments = arguments
}
@ -354,7 +373,7 @@ public enum GetPrompt: Method {
}
/// When the list of available prompts changes, servers that declared the listChanged capability SHOULD send a notification.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2024-11-05/server/prompts/#list-changed-notification
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/prompts/#list-changed-notification
public struct PromptListChangedNotification: Notification {
public static let name: String = "notifications/prompts/list_changed"
}

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@ -18,8 +18,10 @@ public struct Resource: Hashable, Codable, Sendable {
public var description: String?
/// The resource MIME type
public var mimeType: String?
/// The resource metadata
public var metadata: [String: String]?
/// Raw content size in bytes
public var size: Int?
/// Annotations for this resource
public var annotations: Resource.Annotations?
/// Optional set of sized icons that the client can display in a user interface
public var icons: [Icon]?
/// Metadata fields for the resource (see spec for _meta usage)
@ -31,7 +33,8 @@ public struct Resource: Hashable, Codable, Sendable {
title: String? = nil,
description: String? = nil,
mimeType: String? = nil,
metadata: [String: String]? = nil,
size: Int? = nil,
annotations: Resource.Annotations? = nil,
icons: [Icon]? = nil,
_meta: Metadata? = nil
) {
@ -40,7 +43,8 @@ public struct Resource: Hashable, Codable, Sendable {
self.uri = uri
self.description = description
self.mimeType = mimeType
self.metadata = metadata
self.size = size
self.annotations = annotations
self.icons = icons
self._meta = _meta
}
@ -51,7 +55,8 @@ public struct Resource: Hashable, Codable, Sendable {
case title
case description
case mimeType
case metadata
case size
case annotations
case icons
case _meta
}
@ -63,7 +68,8 @@ public struct Resource: Hashable, Codable, Sendable {
title = try container.decodeIfPresent(String.self, forKey: .title)
description = try container.decodeIfPresent(String.self, forKey: .description)
mimeType = try container.decodeIfPresent(String.self, forKey: .mimeType)
metadata = try container.decodeIfPresent([String: String].self, forKey: .metadata)
size = try container.decodeIfPresent(Int.self, forKey: .size)
annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
icons = try container.decodeIfPresent([Icon].self, forKey: .icons)
_meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
}
@ -75,7 +81,8 @@ public struct Resource: Hashable, Codable, Sendable {
try container.encodeIfPresent(title, forKey: .title)
try container.encodeIfPresent(description, forKey: .description)
try container.encodeIfPresent(mimeType, forKey: .mimeType)
try container.encodeIfPresent(metadata, forKey: .metadata)
try container.encodeIfPresent(size, forKey: .size)
try container.encodeIfPresent(annotations, forKey: .annotations)
try container.encodeIfPresent(icons, forKey: .icons)
try container.encodeIfPresent(_meta, forKey: ._meta)
}
@ -181,8 +188,12 @@ public struct Resource: Hashable, Codable, Sendable {
public var description: String?
/// The resource MIME type
public var mimeType: String?
/// Annotations for this template
public var annotations: Resource.Annotations?
/// Optional set of sized icons that the client can display in a user interface
public var icons: [Icon]?
/// Metadata fields for the template (see spec for _meta usage)
public var _meta: Metadata?
public init(
uriTemplate: String,
@ -190,14 +201,18 @@ public struct Resource: Hashable, Codable, Sendable {
title: String? = nil,
description: String? = nil,
mimeType: String? = nil,
icons: [Icon]? = nil
annotations: Resource.Annotations? = nil,
icons: [Icon]? = nil,
_meta: Metadata? = nil
) {
self.uriTemplate = uriTemplate
self.name = name
self.title = title
self.description = description
self.mimeType = mimeType
self.annotations = annotations
self.icons = icons
self._meta = _meta
}
}
@ -233,7 +248,7 @@ public struct Resource: Hashable, Codable, Sendable {
// MARK: -
/// To discover available resources, clients send a `resources/list` request.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/resources/#listing-resources
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/resources/#listing-resources
public enum ListResources: Method {
public static let name: String = "resources/list"
@ -285,7 +300,7 @@ public enum ListResources: Method {
}
/// To retrieve resource contents, clients send a `resources/read` request:
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/resources/#reading-resources
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/resources/#reading-resources
public enum ReadResource: Method {
public static let name: String = "resources/read"
@ -329,7 +344,7 @@ public enum ReadResource: Method {
}
/// To discover available resource templates, clients send a `resources/templates/list` request.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/resources/#resource-templates
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/resources/#resource-templates
public enum ListResourceTemplates: Method {
public static let name: String = "resources/templates/list"
@ -384,7 +399,7 @@ public enum ListResourceTemplates: Method {
}
/// When the list of available resources changes, servers that declared the listChanged capability SHOULD send a notification.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/resources/#list-changed-notification
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/resources/#list-changed-notification
public struct ResourceListChangedNotification: Notification {
public static let name: String = "notifications/resources/list_changed"
@ -392,7 +407,7 @@ public struct ResourceListChangedNotification: Notification {
}
/// Clients can subscribe to specific resources and receive notifications when they change.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/resources/#subscriptions
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/resources/#subscriptions
public enum ResourceSubscribe: Method {
public static let name: String = "resources/subscribe"
@ -416,7 +431,7 @@ public enum ResourceUnsubscribe: Method {
}
/// When a resource changes, servers that declared the updated capability SHOULD send a notification to subscribed clients.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/resources/#subscriptions
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/resources/#subscriptions
public struct ResourceUpdatedNotification: Notification {
public static let name: String = "notifications/resources/updated"

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@ -34,11 +34,27 @@ public actor Server {
public let title: String?
/// The server version
public let version: String
/// Optional description of the server
public let description: String?
/// Optional website URL for the server
public let websiteUrl: String?
/// Optional set of sized icons for display in a user interface
public let icons: [Icon]?
public init(name: String, version: String, title: String? = nil) {
public init(
name: String,
version: String,
title: String? = nil,
description: String? = nil,
websiteUrl: String? = nil,
icons: [Icon]? = nil
) {
self.name = name
self.title = title
self.version = version
self.description = description
self.websiteUrl = websiteUrl
self.icons = icons
}
}
@ -85,11 +101,6 @@ public actor Server {
public init() {}
}
/// Sampling capabilities
public struct Sampling: Hashable, Codable, Sendable {
public init() {}
}
/// Completions capabilities
public struct Completions: Hashable, Codable, Sendable {
public init() {}
@ -103,8 +114,6 @@ public actor Server {
public var prompts: Prompts?
/// Resources capabilities
public var resources: Resources?
/// Sampling capabilities
public var sampling: Sampling?
/// Tools capabilities
public var tools: Tools?
@ -113,14 +122,12 @@ public actor Server {
logging: Logging? = nil,
prompts: Prompts? = nil,
resources: Resources? = nil,
sampling: Sampling? = nil,
tools: Tools? = nil
) {
self.completions = completions
self.logging = logging
self.prompts = prompts
self.resources = resources
self.sampling = sampling
self.tools = tools
}
}
@ -161,47 +168,6 @@ public actor Server {
/// Pending request tasks (for cancellation support)
private var pendingRequestTasks: [ID: Task<Response<AnyMethod>, Error>] = [:]
/// An error indicating a type mismatch when decoding a pending request
private struct TypeMismatchError: Swift.Error {}
/// A pending request with a continuation for the result
private struct PendingRequest<T> {
let continuation: CheckedContinuation<T, Swift.Error>
}
/// A type-erased pending request
private struct AnyPendingRequest: Sendable {
private let _resume: @Sendable (Result<Any, Swift.Error>) -> Void
init<T: Sendable & Decodable>(_ request: PendingRequest<T>) {
_resume = { result in
switch result {
case .success(let value):
if let typedValue = value as? T {
request.continuation.resume(returning: typedValue)
} else if let value = value as? Value,
let data = try? JSONEncoder().encode(value),
let decoded = try? JSONDecoder().decode(T.self, from: data)
{
request.continuation.resume(returning: decoded)
} else {
request.continuation.resume(throwing: TypeMismatchError())
}
case .failure(let error):
request.continuation.resume(throwing: error)
}
}
}
func resume(returning value: Any) {
_resume(.success(value))
}
func resume(throwing error: Swift.Error) {
_resume(.failure(error))
}
}
/// Pending requests sent to the client, awaiting responses
private var pendingRequests: [ID: AnyPendingRequest] = [:]
@ -330,6 +296,16 @@ public actor Server {
await task?.value
}
// MARK: - Request Context
/// The JSON-RPC request ID of the currently executing method handler.
///
/// Set via `@TaskLocal` before dispatching each request, so it propagates
/// automatically into the handler task. Accessible package-wide for
/// transports that need to identify the active request (e.g. closing an
/// SSE stream mid-call for reconnection testing per SEP-1699).
@TaskLocal package static var currentRequestID: ID? = nil
// MARK: - Registration
/// Register a method handler
@ -523,8 +499,8 @@ public actor Server {
/// - SeeAlso: https://modelcontextprotocol.io/docs/concepts/elicitation
public func requestElicitation(
message: String,
requestedSchema: Elicitation.RequestSchema,
mode: Elicitation.Mode? = nil,
requestedSchema: Elicitation.RequestSchema? = nil,
_meta: Metadata? = nil
) async throws -> CreateElicitation.Result {
guard connection != nil else {
@ -774,26 +750,30 @@ public actor Server {
return response
}
// Create a task to handle the request with cancellation support
let handlerTask = Task<Response<AnyMethod>, Error> {
do {
// Check if task was cancelled before starting
try Task.checkCancellation()
// Create a task to handle the request with cancellation support.
// Set currentRequestID as a task local so handlers can identify the active request.
var handlerTask: Task<Response<AnyMethod>, Error>!
Server.$currentRequestID.withValue(request.id) {
handlerTask = Task<Response<AnyMethod>, Error> {
do {
// Check if task was cancelled before starting
try Task.checkCancellation()
// Handle request and get response
let response = try await handler(request)
return response
} catch is CancellationError {
// Request was cancelled, don't send a response per MCP spec
await logger?.debug(
"Request cancelled",
metadata: ["id": "\(request.id)", "method": "\(request.method)"]
)
throw CancellationError()
} catch {
let mcpError =
error as? MCPError ?? MCPError.internalError(error.localizedDescription)
return AnyMethod.response(id: request.id, error: mcpError)
// Handle request and get response
let response = try await handler(request)
return response
} catch is CancellationError {
// Request was cancelled, don't send a response per MCP spec
await logger?.debug(
"Request cancelled",
metadata: ["id": "\(request.id)", "method": "\(request.method)"]
)
throw CancellationError()
} catch {
let mcpError =
error as? MCPError ?? MCPError.internalError(error.localizedDescription)
return AnyMethod.response(id: request.id, error: mcpError)
}
}
}
@ -969,11 +949,19 @@ public actor Server {
await self.logger?.debug(
"Received cancellation notification",
metadata: [
"requestId": "\(requestId)",
"requestId": requestId.map { "\($0)" } ?? "none",
"reason": reason.map { "\($0)" } ?? "none",
]
)
guard let requestId = requestId else {
await self.logger?.warning(
"Received cancellation notification with no requestId (violates spec MUST)",
metadata: ["reason": reason.map { "\($0)" } ?? "none"]
)
return
}
// Cancel the pending request task if it exists and remove from tracking
if let task = await self.removePendingRequest(id: requestId) {
task.cancel()

View file

@ -114,11 +114,11 @@ public struct Tool: Hashable, Codable, Sendable {
/// Content types that can be returned by a tool
public enum Content: Hashable, Codable, Sendable {
/// Text content
case text(String)
case text(text: String, annotations: Resource.Annotations?, _meta: Metadata?)
/// Image content
case image(data: String, mimeType: String, metadata: Metadata?)
case image(data: String, mimeType: String, annotations: Resource.Annotations?, _meta: Metadata?)
/// Audio content
case audio(data: String, mimeType: String)
case audio(data: String, mimeType: String, annotations: Resource.Annotations?, _meta: Metadata?)
/// Embedded resource content (EmbeddedResource from spec)
case resource(resource: Resource.Content, annotations: Resource.Annotations? = nil, _meta: Metadata? = nil)
/// Resource link
@ -128,12 +128,48 @@ public struct Tool: Hashable, Codable, Sendable {
annotations: Resource.Annotations? = nil
)
/// Deprecated compatibility factory for older call sites that used `.text("...")` and `.text("...", metadata: ...)`.
@available(*, deprecated, message: "Use .text(text:annotations:_meta:) instead.")
public static func text(_ text: String, metadata: Metadata? = nil) -> Self {
.text(text: text, annotations: nil, _meta: metadata)
}
/// Deprecated compatibility factory for older call sites that used `.text(text: ..., metadata: ...)`.
@available(*, deprecated, message: "Use .text(text:annotations:_meta:) instead.")
public static func text(text: String, metadata: Metadata? = nil) -> Self {
.text(text: text, annotations: nil, _meta: metadata)
}
/// Deprecated compatibility factory for older call sites that used `.image(..., metadata: ...)`.
@available(*, deprecated, message: "Use .image(data:mimeType:annotations:_meta:) instead.")
public static func image(_ data: String, _ mimeType: String, metadata: Metadata? = nil) -> Self {
.image(data: data, mimeType: mimeType, annotations: nil, _meta: metadata)
}
/// Deprecated compatibility factory for older call sites that used `.image(data:mimeType:metadata:)`.
@available(*, deprecated, message: "Use .image(data:mimeType:annotations:_meta:) instead.")
public static func image(data: String, mimeType: String, metadata: Metadata? = nil) -> Self {
.image(data: data, mimeType: mimeType, annotations: nil, _meta: metadata)
}
/// Deprecated compatibility factory for older call sites that used `.audio(..., metadata: ...)`.
@available(*, deprecated, message: "Use .audio(data:mimeType:annotations:_meta:) instead.")
public static func audio(_ data: String, _ mimeType: String, metadata: Metadata? = nil) -> Self {
.audio(data: data, mimeType: mimeType, annotations: nil, _meta: metadata)
}
/// Deprecated compatibility factory for older call sites that used `.audio(data:mimeType:metadata:)`.
@available(*, deprecated, message: "Use .audio(data:mimeType:annotations:_meta:) instead.")
public static func audio(data: String, mimeType: String, metadata: Metadata? = nil) -> Self {
.audio(data: data, mimeType: mimeType, annotations: nil, _meta: metadata)
}
private enum CodingKeys: String, CodingKey {
case type
case text
case image
case resource
case resourceLink
case resource_link
case audio
case uri
case name
@ -152,23 +188,27 @@ public struct Tool: Hashable, Codable, Sendable {
switch type {
case "text":
let text = try container.decode(String.self, forKey: .text)
self = .text(text)
let annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
let _meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
self = .text(text: text, annotations: annotations, _meta: _meta)
case "image":
let data = try container.decode(String.self, forKey: .data)
let mimeType = try container.decode(String.self, forKey: .mimeType)
let _meta = try container.decodeIfPresent(
Metadata.self, forKey: ._meta)
self = .image(data: data, mimeType: mimeType, metadata: _meta)
let annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
let _meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
self = .image(data: data, mimeType: mimeType, annotations: annotations, _meta: _meta)
case "audio":
let data = try container.decode(String.self, forKey: .data)
let mimeType = try container.decode(String.self, forKey: .mimeType)
self = .audio(data: data, mimeType: mimeType)
let annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
let _meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
self = .audio(data: data, mimeType: mimeType, annotations: annotations, _meta: _meta)
case "resource":
let resourceContent = try container.decode(Resource.Content.self, forKey: .resource)
let annotations = try container.decodeIfPresent(Resource.Annotations.self, forKey: .annotations)
let _meta = try container.decodeIfPresent(Metadata.self, forKey: ._meta)
self = .resource(resource: resourceContent, annotations: annotations, _meta: _meta)
case "resourceLink":
case "resource_link":
let uri = try container.decode(String.self, forKey: .uri)
let name = try container.decode(String.self, forKey: .name)
let title = try container.decodeIfPresent(String.self, forKey: .title)
@ -189,18 +229,23 @@ public struct Tool: Hashable, Codable, Sendable {
var container = encoder.container(keyedBy: CodingKeys.self)
switch self {
case .text(let text):
case .text(let text, let annotations, let _meta):
try container.encode("text", forKey: .type)
try container.encode(text, forKey: .text)
case .image(let data, let mimeType, let metadata):
try container.encodeIfPresent(annotations, forKey: .annotations)
try container.encodeIfPresent(_meta, forKey: ._meta)
case .image(let data, let mimeType, let annotations, let _meta):
try container.encode("image", forKey: .type)
try container.encode(data, forKey: .data)
try container.encode(mimeType, forKey: .mimeType)
try container.encodeIfPresent(metadata, forKey: ._meta)
case .audio(let data, let mimeType):
try container.encodeIfPresent(annotations, forKey: .annotations)
try container.encodeIfPresent(_meta, forKey: ._meta)
case .audio(let data, let mimeType, let annotations, let _meta):
try container.encode("audio", forKey: .type)
try container.encode(data, forKey: .data)
try container.encode(mimeType, forKey: .mimeType)
try container.encodeIfPresent(annotations, forKey: .annotations)
try container.encodeIfPresent(_meta, forKey: ._meta)
case .resource(let resourceContent, let annotations, let _meta):
try container.encode("resource", forKey: .type)
try container.encode(resourceContent, forKey: .resource)
@ -208,7 +253,7 @@ public struct Tool: Hashable, Codable, Sendable {
try container.encodeIfPresent(_meta, forKey: ._meta)
case .resourceLink(
let uri, let name, let title, let description, let mimeType, let annotations):
try container.encode("resourceLink", forKey: .type)
try container.encode("resource_link", forKey: .type)
try container.encode(uri, forKey: .uri)
try container.encode(name, forKey: .name)
try container.encodeIfPresent(title, forKey: .title)
@ -261,7 +306,7 @@ public struct Tool: Hashable, Codable, Sendable {
// MARK: -
/// To discover available tools, clients send a `tools/list` request.
/// - SeeAlso: https://spec.modelcontextprotocol.io/specification/2025-06-18/server/tools/#listing-tools
/// - SeeAlso: https://modelcontextprotocol.io/specification/2025-11-25/server/tools/#listing-tools
public enum ListTools: Method {
public static let name = "tools/list"