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Validate tool annotations value

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Tool annotations were introduced in the "2025-03-26" specification:

> Added comprehensive tool annotations for better describing tool behavior,
> like whether it is read-only or destructive (PR modelcontextprotocol/modelcontextprotocol#185)

https://modelcontextprotocol.io/specification/2025-03-26/changelog#major-changes

This means they are not supported in the "2024-11-05" specification,
so validation errors will be raised for `protocol_version: "2024-11-05"`.
This commit is contained in:
Koichi ITO 2025-09-01 01:10:15 +09:00
commit 08048283e4
1 changed files with 47 additions and 4 deletions
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22
test/mcp/server_test.rb
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@ -822,6 +822,28 @@ module MCP
assert_equal("`instructions` supported by protocol version 2025-03-26 or higher", exception.message)
end
test "server uses annotations when configured with protocol version 2025-03-26" do
configuration = Configuration.new(protocol_version: "2025-03-26")
server = Server.new(name: "test_server", configuration: configuration)
server.define_tool(
name: "defined_tool",
annotations: { title: "test server" },
)
assert_equal({ destructiveHint: true, idempotentHint: false, openWorldHint: true, readOnlyHint: false, title: "test server" }, server.tools.first[1].annotations.to_h)
end
test "raises error if annotations are used with protocol version 2024-11-05" do
configuration = Configuration.new(protocol_version: "2024-11-05")
exception = assert_raises(ArgumentError) do
server = Server.new(name: "test_server", configuration: configuration)
server.define_tool(
name: "defined_tool",
annotations: { title: "test server" },
)
end
assert_equal("Error occurred in defined_tool. `annotations` are supported by protocol version 2025-03-26 or higher", exception.message)
end
test "#define_tool adds a tool to the server" do
@server.define_tool(
name: "defined_tool",