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fastmcp.prompts.prompt

Base classes for FastMCP prompts.

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Functions

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Message 

Message(content: str | ContentBlock, role: Role | None = None, **kwargs: Any) -> PromptMessage
A user-friendly constructor for PromptMessage.

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Classes

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PromptArgument

An argument that can be passed to a prompt.

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Prompt

A prompt template that can be rendered with parameters. Methods:

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enable 

enable(self) -> None

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disable 

disable(self) -> None

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to_mcp_prompt 

to_mcp_prompt(self, **overrides: Any) -> MCPPrompt
Convert the prompt to an MCP prompt.

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from_function 

from_function(fn: Callable[..., PromptResult | Awaitable[PromptResult]], name: str | None = None, title: str | None = None, description: str | None = None, tags: set[str] | None = None, enabled: bool | None = None, meta: dict[str, Any] | None = None) -> FunctionPrompt
Create a Prompt from a function. The function can return:
  • A string (converted to a message)
  • A Message object
  • A dict (converted to a message)
  • A sequence of any of the above

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render 

render(self, arguments: dict[str, Any] | None = None) -> list[PromptMessage]
Render the prompt with arguments.

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FunctionPrompt

A prompt that is a function. Methods:

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from_function 

from_function(cls, fn: Callable[..., PromptResult | Awaitable[PromptResult]], name: str | None = None, title: str | None = None, description: str | None = None, tags: set[str] | None = None, enabled: bool | None = None, meta: dict[str, Any] | None = None) -> FunctionPrompt
Create a Prompt from a function. The function can return:
  • A string (converted to a message)
  • A Message object
  • A dict (converted to a message)
  • A sequence of any of the above

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render 

render(self, arguments: dict[str, Any] | None = None) -> list[PromptMessage]
Render the prompt with arguments.