python-sdk/docs_src/lowlevel/tutorial006.py at main · uuzzrm/python-sdk · GitHub

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from pydantic import BaseModel

from mcp.server import Server, ServerRequestContext

from mcp.types import (

CallToolRequestParams,

CallToolResult,

ListToolsResult,

PaginatedRequestParams,

RequestParams,

TextContent,

Tool,

)

SEARCH_BOOKS = Tool(

name="search_books",

description="Search the catalog by title or author.",

input_schema={

"type": "object",

"properties": {"query": {"type": "string"}, "limit": {"type": "integer"}},

"required": ["query", "limit"],

)

async def list_tools(ctx: ServerRequestContext, params: PaginatedRequestParams | None) -> ListToolsResult:

return ListToolsResult(tools=[SEARCH_BOOKS])

async def call_tool(ctx: ServerRequestContext, params: CallToolRequestParams) -> CallToolResult:

args = params.arguments or {}

text = f"Found 3 books matching {args['query']!r} (showing up to {args['limit']})."

return CallToolResult(content=[TextContent(type="text", text=text)])

class ReindexParams(RequestParams):

full: bool = False

class ReindexResult(BaseModel):

indexed: int

async def reindex(ctx: ServerRequestContext, params: ReindexParams) -> ReindexResult:

return ReindexResult(indexed=3)

server = Server("Bookshop", on_list_tools=list_tools, on_call_tool=call_tool)

server.add_request_handler("bookshop/reindex", ReindexParams, reindex)