feat(SEP-973): add support for icons and websiteUrl across relevant types (#432)

crates/rmcp/src/model/content.rs

@@ -257,6 +257,7 @@ mod tests {
             description: Some("A test file".to_string()),
             mime_type: Some("text/plain".to_string()),
             size: Some(100),
+            icons: None,
         });
 
         let json = serde_json::to_string(&resource_link).unwrap();

crates/rmcp/src/model/prompt.rs

@@ -2,7 +2,7 @@ use base64::engine::{Engine, general_purpose::STANDARD as BASE64_STANDARD};
 use serde::{Deserialize, Serialize};
 
 use super::{
-    AnnotateAble, Annotations, RawEmbeddedResource, RawImageContent,
+    AnnotateAble, Annotations, Icon, RawEmbeddedResource, RawImageContent,
     content::{EmbeddedResource, ImageContent},
     resource::ResourceContents,
 };
@@ -22,6 +22,9 @@ pub struct Prompt {
     /// Optional arguments that can be passed to customize the prompt
     #[serde(skip_serializing_if = "Option::is_none")]
     pub arguments: Option<Vec<PromptArgument>>,
+    /// Optional list of icons for the prompt
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub icons: Option<Vec<Icon>>,
 }
 
 impl Prompt {
@@ -40,6 +43,7 @@ impl Prompt {
             title: None,
             description: description.map(Into::into),
             arguments,
+            icons: None,
         }
     }
 }

crates/rmcp/src/model/resource.rs

@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-use super::{Annotated, Meta};
+use super::{Annotated, Icon, Meta};
 
 /// Represents a resource in the extension with metadata
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq)]
@@ -26,6 +26,9 @@ pub struct RawResource {
     /// This can be used by Hosts to display file sizes and estimate context window us
     #[serde(skip_serializing_if = "Option::is_none")]
     pub size: Option<u32>,
+    /// Optional list of icons for the resource
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub icons: Option<Vec<Icon>>,
 }
 
 pub type Resource = Annotated<RawResource>;
@@ -91,6 +94,7 @@ impl RawResource {
             description: None,
             mime_type: None,
             size: None,
+            icons: None,
         }
     }
 }
@@ -110,6 +114,7 @@ mod tests {
             description: Some("Test resource".to_string()),
             mime_type: Some("text/plain".to_string()),
             size: Some(100),
+            icons: None,
         };
 
         let json = serde_json::to_string(&resource).unwrap();

crates/rmcp/src/model/tool.rs

@@ -6,7 +6,7 @@ use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
-use super::JsonObject;
+use super::{Icon, JsonObject};
 
 /// A tool that can be used by a model.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
@@ -29,6 +29,9 @@ pub struct Tool {
     #[serde(skip_serializing_if = "Option::is_none")]
     /// Optional additional tool information.
     pub annotations: Option<ToolAnnotations>,
+    /// Optional list of icons for the tool
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub icons: Option<Vec<Icon>>,
 }
 
 /// Additional properties describing a Tool to clients.
@@ -146,6 +149,7 @@ impl Tool {
             input_schema: input_schema.into(),
             output_schema: None,
             annotations: None,
+            icons: None,
         }
     }