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update _meta usage guidance in types.ts #639

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Jun 16, 2025
Merged

update _meta usage guidance in types.ts #639

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54 changes: 33 additions & 21 deletions src/types.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -44,8 +44,9 @@ export const RequestSchema = z.object({
const BaseNotificationParamsSchema = z
.object({
/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
.passthrough();
Expand All @@ -58,8 +59,9 @@ export const NotificationSchema = z.object({
export const ResultSchema = z
.object({
/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
.passthrough();
Expand Down Expand Up @@ -436,7 +438,8 @@ export const ResourceContentsSchema = z
*/
mimeType: z.optional(z.string()),
/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
Expand Down Expand Up @@ -478,8 +481,9 @@ export const ResourceSchema = BaseMetadataSchema.extend({
mimeType: z.optional(z.string()),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
});

Expand All @@ -505,8 +509,9 @@ export const ResourceTemplateSchema = BaseMetadataSchema.extend({
mimeType: z.optional(z.string()),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
});

Expand Down Expand Up @@ -642,7 +647,8 @@ export const PromptSchema = BaseMetadataSchema.extend({
*/
arguments: z.optional(z.array(PromptArgumentSchema)),
/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
});
Expand Down Expand Up @@ -690,8 +696,9 @@ export const TextContentSchema = z
text: z.string(),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
.passthrough();
Expand All @@ -712,8 +719,9 @@ export const ImageContentSchema = z
mimeType: z.string(),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
.passthrough();
Expand All @@ -734,8 +742,9 @@ export const AudioContentSchema = z
mimeType: z.string(),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
.passthrough();
Expand All @@ -748,7 +757,8 @@ export const EmbeddedResourceSchema = z
type: z.literal("resource"),
resource: z.union([TextResourceContentsSchema, BlobResourceContentsSchema]),
/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
Expand Down Expand Up @@ -895,8 +905,9 @@ export const ToolSchema = BaseMetadataSchema.extend({
annotations: z.optional(ToolAnnotationsSchema),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
});

Expand Down Expand Up @@ -1230,8 +1241,9 @@ export const RootSchema = z
name: z.optional(z.string()),

/**
* Reserved by MCP for protocol-level metadata; implementations must not make assumptions about its contents.
*/
* See [MCP specification](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/47339c03c143bb4ec01a26e721a1b8fe66634ebe/docs/specification/draft/basic/index.mdx#general-fields)
* for notes on _meta usage.
*/
_meta: z.optional(z.object({}).passthrough()),
})
.passthrough();
Expand Down