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feat: Adds _meta to additional interface types. #710

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Merged
dsp-ant merged 2 commits into from
Jun 13, 2025
Merged

feat: Adds _meta to additional interface types. #710

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6add6c4
spec: Adds _meta to additional interface types.
mbleigh Jun 11, 2025
21f6ec1
Merge branch 'main' into meta-on-resources
mbleigh Jun 12, 2025
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69 changes: 69 additions & 0 deletions 69 schema/draft/schema.json
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51 changes: 51 additions & 0 deletions 51 schema/draft/schema.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ export interface Request {
* If specified, the caller is requesting out-of-band progress notifications for this request (as represented by notifications/progress). The value of this parameter is an opaque token that will be attached to any subsequent notifications. The receiver is not obligated to provide these notifications.
*/
progressToken?: ProgressToken;
[key: string]: unknown;
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@mbleigh mbleigh Jun 11, 2025

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It seems like this was likely a mistake/omission -- presumably request metadata is intended to allow additional keys and not just progressToken, right?

};
[key: string]: unknown;
};
Expand Down Expand Up @@ -472,6 +473,11 @@ export interface Resource {
* This can be used by Hosts to display file sizes and estimate context window usage.
*/
size?: number;

/**
* Reserved field for additional metadata.
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@dsp-ant dsp-ant Jun 13, 2025

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Notable that this is "reserved by MCP for additional metadata", as the other fields.

*/
_meta?: { [key: string]: unknown };
}

/**
Expand Down Expand Up @@ -508,6 +514,11 @@ export interface ResourceTemplate {
* Optional annotations for the client.
*/
annotations?: Annotations;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/**
Expand All @@ -524,6 +535,11 @@ export interface ResourceContents {
* The MIME type of this resource, if known.
*/
mimeType?: string;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

export interface TextResourceContents extends ResourceContents {
Expand Down Expand Up @@ -601,6 +617,11 @@ export interface Prompt {
* A list of arguments to use for templating the prompt.
*/
arguments?: PromptArgument[];

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/**
Expand Down Expand Up @@ -660,6 +681,11 @@ export interface EmbeddedResource {
* Optional annotations for the client.
*/
annotations?: Annotations;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}
/**
* An optional notification from the server to the client, informing it that the list of prompts it offers has changed. This may be issued by servers without any previous subscription from the client.
Expand Down Expand Up @@ -825,6 +851,11 @@ export interface Tool {
* Optional additional tool information.
*/
annotations?: ToolAnnotations;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/* Logging */
Expand Down Expand Up @@ -994,6 +1025,11 @@ export interface TextContent {
* Optional annotations for the client.
*/
annotations?: Annotations;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/**
Expand All @@ -1018,6 +1054,11 @@ export interface ImageContent {
* Optional annotations for the client.
*/
annotations?: Annotations;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/**
Expand All @@ -1042,6 +1083,11 @@ export interface AudioContent {
* Optional annotations for the client.
*/
annotations?: Annotations;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/**
Expand Down Expand Up @@ -1243,6 +1289,11 @@ export interface Root {
* referencing the root in other parts of the application.
*/
name?: string;

/**
* Reserved field for additional metadata.
*/
_meta?: { [key: string]: unknown };
}

/**
Expand Down
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