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fastmcp.tools.tool_manager

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Classes

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ToolManager

Manages FastMCP tools. Methods:

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mount 

mount(self, server: MountedServer) -> None
Adds a mounted server as a source for tools.

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has_tool 

has_tool(self, key: str) -> bool
Check if a tool exists.

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get_tool 

get_tool(self, key: str) -> Tool
Get tool by key.

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get_tools 

get_tools(self) -> dict[str, Tool]
Gets the complete, unfiltered inventory of all tools.

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list_tools 

list_tools(self) -> list[Tool]
Lists all tools, applying protocol filtering.

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add_tool_from_fn 

add_tool_from_fn(self, fn: Callable[..., Any], name: str | None = None, description: str | None = None, tags: set[str] | None = None, annotations: ToolAnnotations | None = None, serializer: Callable[[Any], str] | None = None, exclude_args: list[str] | None = None) -> Tool
Add a tool to the server.

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add_tool 

add_tool(self, tool: Tool) -> Tool
Register a tool with the server.

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add_tool_transformation 

add_tool_transformation(self, tool_name: str, transformation: ToolTransformConfig) -> None
Add a tool transformation.

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get_tool_transformation 

get_tool_transformation(self, tool_name: str) -> ToolTransformConfig | None
Get a tool transformation.

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remove_tool_transformation 

remove_tool_transformation(self, tool_name: str) -> None
Remove a tool transformation.

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remove_tool 

remove_tool(self, key: str) -> None
Remove a tool from the server. Args:
  • key: The key of the tool to remove
Raises:
  • NotFoundError: If the tool is not found

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call_tool 

call_tool(self, key: str, arguments: dict[str, Any]) -> ToolResult
Internal API for servers: Finds and calls a tool, respecting the filtered protocol path.