8000 Update _meta usage guidance in types by ihrpr · Pull Request #971 · modelcontextprotocol/python-sdk · GitHub
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Update _meta usage guidance in types #971

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Merged
merged 1 commit into from
Jun 17, 2025
+24 −12
Merged

Update _meta usage guidance in types #971

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36 changes: 24 additions & 12 deletions src/mcp/types.py
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Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,8 @@ class Meta(BaseModel):

meta: Meta | None = Field(alias="_meta", default=None)
"""
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.
"""


Expand Down Expand Up @@ -106,7 +107,8 @@ class Result(BaseModel):

meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down Expand Up @@ -393,7 +395,8 @@ class Resource(BaseModel):
annotations: Annotations | None = None
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand All @@ -418,7 +421,8 @@ class ResourceTemplate(BaseModel):
annotations: Annotations | None = None
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down Expand Up @@ -468,7 +472,8 @@ class ResourceContents(BaseModel):
"""The MIME type of this resource, if known."""
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down Expand Up @@ -599,7 +604,8 @@ class Prompt(BaseModel):
"""A list of arguments to use for templating the prompt."""
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down Expand Up @@ -636,7 +642,8 @@ class TextContent(BaseModel):
annotations: Annotations | None = None
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand All @@ -655,7 +662,8 @@ class ImageContent(BaseModel):
annotations: Annotations | None = None
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand All @@ -674,7 +682,8 @@ class AudioContent(BaseModel):
annotations: Annotations | None = None
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand All @@ -700,7 +709,8 @@ class EmbeddedResource(BaseModel):
annotations: Annotations | None = None
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down Expand Up @@ -803,7 +813,8 @@ class Tool(BaseModel):
"""Optional additional tool information."""
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down Expand Up @@ -1109,7 +1120,8 @@ class Root(BaseModel):
"""
meta: dict[str, Any] | None = Field(alias="_meta", default=None)
"""
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.
"""
model_config = ConfigDict(extra="allow")

Expand Down
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