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fastmcp.server.transforms.prompts_as_tools

Transform that exposes prompts as tools. This transform generates tools for listing and getting prompts, enabling clients that only support tools to access prompt functionality. Example: 
from fastmcp import FastMCP
from fastmcp.server.transforms import PromptsAsTools

mcp = FastMCP("Server")
mcp.add_transform(PromptsAsTools(mcp))
# Now has list_prompts and get_prompt tools

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Classes

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PromptsAsTools

Transform that adds tools for listing and getting prompts. Generates two tools:
  • list_prompts: Lists all prompts from the provider
  • get_prompt: Gets a specific prompt with optional arguments
The transform captures a provider reference at construction and queries it for prompts when the generated tools are called. When used with FastMCP, the provider’s auth and visibility filtering is automatically applied. Methods:

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list_tools 

list_tools(self, tools: Sequence[Tool]) -> Sequence[Tool]
Add prompt tools to the tool list.

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get_tool 

get_tool(self, name: str, call_next: GetToolNext) -> Tool | None
Get a tool by name, including generated prompt tools.