27 lines
651 B
Python
27 lines
651 B
Python
from typing import Annotated
|
|
|
|
from pydantic import BaseModel
|
|
|
|
from mcp.server import MCPServer
|
|
from mcp.server.mcpserver import Resolve
|
|
|
|
mcp = MCPServer("Bookshop")
|
|
|
|
INVENTORY = {"Dune": 7, "Neuromancer": 0}
|
|
|
|
|
|
class Stock(BaseModel):
|
|
title: str
|
|
copies: int
|
|
|
|
|
|
async def check_stock(title: str) -> Stock:
|
|
return Stock(title=title, copies=INVENTORY.get(title, 0))
|
|
|
|
|
|
@mcp.tool()
|
|
async def reserve_book(title: str, stock: Annotated[Stock, Resolve(check_stock)]) -> str:
|
|
"""Reserve a copy of a book."""
|
|
if stock.copies == 0:
|
|
return f"{title!r} is out of stock."
|
|
return f"Reserved {title!r} ({stock.copies - 1} copies left)."
|