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Document pydantic.ValidationError in client Raises sections (#3036)

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Max 2026-07-01 00:03:17 +01:00 • committed by GitHub
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6
src/mcp/client/client.py
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@ -629,6 +629,8 @@ class Client:
Raises: Raises:
InputRequiredRoundsExceededError: `input_required_max_rounds` exhausted. InputRequiredRoundsExceededError: `input_required_max_rounds` exhausted.
MCPError: A callback returned `ErrorData` for an embedded input request. MCPError: A callback returned `ErrorData` for an embedded input request.
pydantic.ValidationError: The server returned a result that does not
conform to the negotiated protocol version.
""" """
async def retry(r: InputResponses | None, s: str | None) -> ReadResourceResult | InputRequiredResult: async def retry(r: InputResponses | None, s: str | None) -> ReadResourceResult | InputRequiredResult:
@ -711,6 +713,8 @@ class Client:
Raises: Raises:
InputRequiredRoundsExceededError: `input_required_max_rounds` exhausted. InputRequiredRoundsExceededError: `input_required_max_rounds` exhausted.
MCPError: A callback returned `ErrorData` for an embedded input request. MCPError: A callback returned `ErrorData` for an embedded input request.
pydantic.ValidationError: The server returned a result that does not
conform to the negotiated protocol version.
""" """
async def retry(r: InputResponses | None, s: str | None) -> CallToolResult | InputRequiredResult | Result: async def retry(r: InputResponses | None, s: str | None) -> CallToolResult | InputRequiredResult | Result:
@ -787,6 +791,8 @@ class Client:
Raises: Raises:
InputRequiredRoundsExceededError: `input_required_max_rounds` exhausted. InputRequiredRoundsExceededError: `input_required_max_rounds` exhausted.
MCPError: A callback returned `ErrorData` for an embedded input request. MCPError: A callback returned `ErrorData` for an embedded input request.
pydantic.ValidationError: The server returned a result that does not
conform to the negotiated protocol version.
""" """
async def retry(r: InputResponses | None, s: str | None) -> GetPromptResult | InputRequiredResult: async def retry(r: InputResponses | None, s: str | None) -> GetPromptResult | InputRequiredResult:

2
src/mcp/client/session.py
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@ -452,6 +452,8 @@ class ClientSession:
MCPError: Error response, read timeout, or connection closed. MCPError: Error response, read timeout, or connection closed.
RuntimeError: Called before entering the context manager. RuntimeError: Called before entering the context manager.
ValueError: The request declares `name_param` but its params carry no string name. ValueError: The request declares `name_param` but its params carry no string name.
pydantic.ValidationError: The server returned a result that does not
conform to the negotiated protocol version.
""" """
data = request.model_dump(by_alias=True, mode="json", exclude_none=True) data = request.model_dump(by_alias=True, mode="json", exclude_none=True)
method: str = data["method"] method: str = data["method"]