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from mcp.server import Server, ServerRequestContext

from mcp.types import (

CallToolRequestParams,

CallToolResult,

ListToolsResult,

PaginatedRequestParams,

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"],

},

output_schema={

"type": "object",

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

"required": ["matches", "query"],

},

)

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 {}

data = {"matches": 3, "query": args["query"]}

return CallToolResult(

content=[TextContent(type="text", text=f"Found 3 books matching {args['query']!r}.")],

structured_content=data,

_meta={"bookshop/record_ids": ["bk_17", "bk_42", "bk_99"]},

)

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