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modelcontextprotocol--pytho…/docs_src/mrtr/tutorial001.py
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

54 lines
1.7 KiB
Python

from mcp_types import (
CallToolRequestParams,
CallToolResult,
ElicitRequest,
ElicitRequestFormParams,
ElicitResult,
InputRequiredResult,
ListToolsResult,
PaginatedRequestParams,
TextContent,
Tool,
)
from mcp.server import Server, ServerRequestContext
ASK_REGION = ElicitRequest(
params=ElicitRequestFormParams(
message="Which region should the database live in?",
requested_schema={
"type": "object",
"properties": {"region": {"type": "string"}},
"required": ["region"],
},
)
)
async def list_tools(ctx: ServerRequestContext, params: PaginatedRequestParams | None) -> ListToolsResult:
return ListToolsResult(
tools=[
Tool(
name="provision",
description="Provision a database. Asks which region to put it in.",
input_schema={
"type": "object",
"properties": {"name": {"type": "string"}},
"required": ["name"],
},
)
]
)
async def call_tool(ctx: ServerRequestContext, params: CallToolRequestParams) -> CallToolResult | InputRequiredResult:
answer = (params.input_responses or {}).get("region")
if not isinstance(answer, ElicitResult) or answer.content is None:
return InputRequiredResult(input_requests={"region": ASK_REGION}, request_state="provision-v1")
name = (params.arguments or {})["name"]
text = f"Provisioned {name!r} in {answer.content['region']}."
return CallToolResult(content=[TextContent(type="text", text=text)])
server = Server("Provisioner", on_list_tools=list_tools, on_call_tool=call_tool)