from mcp_types import ToolAnnotations from mcp.server import MCPServer mcp = MCPServer("Bookshop") @mcp.tool( title="Search the catalog", annotations=ToolAnnotations(read_only_hint=True, open_world_hint=False), ) def search_books(query: str) -> str: """Search the catalog by title or author.""" return f"Found 3 books matching {query!r}."