fastmcp.server.middleware.tool_injection

A middleware for injecting tools into the MCP server context.

Functions

list_prompts ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L57" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

list_prompts(context: Context) -> list[Prompt]

List prompts available on the server.

get_prompt ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L67" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

get_prompt(context: Context, name: Annotated[str, 'The name of the prompt to render.'], arguments: Annotated[dict[str, Any] | None, 'The arguments to pass to the prompt.'] = None) -> mcp.types.GetPromptResult

Render a prompt available on the server.

list_resources ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L102" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

list_resources(context: Context) -> list[mcp.types.Resource]

List resources available on the server.

read_resource ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L112" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

read_resource(context: Context, uri: Annotated[AnyUrl | str, 'The URI of the resource to read.']) -> ResourceResult

Read a resource available on the server.

Classes

ToolInjectionMiddleware ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L24" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

A middleware for injecting tools into the context.

Methods:

on_list_tools ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L35" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

on_list_tools(self, context: MiddlewareContext[mcp.types.ListToolsRequest], call_next: CallNext[mcp.types.ListToolsRequest, Sequence[Tool]]) -> Sequence[Tool]

Inject tools into the response.

on_call_tool ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L44" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

on_call_tool(self, context: MiddlewareContext[mcp.types.CallToolRequestParams], call_next: CallNext[mcp.types.CallToolRequestParams, ToolResult]) -> ToolResult

Intercept tool calls to injected tools.

PromptToolMiddleware ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L83" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

A middleware for injecting prompts as tools into the context.

.. deprecated:: Use fastmcp.server.transforms.PromptsAsTools instead.

ResourceToolMiddleware ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/tool_injection.py#L125" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

A middleware for injecting resources as tools into the context.

.. deprecated:: Use fastmcp.server.transforms.ResourcesAsTools instead.