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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 | MCPContent, 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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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, description: str | None = None, tags: set[str] | None = None, enabled: bool | 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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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, description: str | None = None, tags: set[str] | None = None, enabled: bool | 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