wehub-resource-sync
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40 lines
1.8 KiB
Python
40 lines
1.8 KiB
Python
"""Multi-round tool result (2026 era): a tool returns input_required and resumes from echoed state."""
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from mcp_types import ElicitRequest, ElicitRequestedSchema, ElicitRequestFormParams, ElicitResult, InputRequiredResult
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from mcp.server.mcpserver import Context, MCPServer
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from stories._hosting import run_server_from_args
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CONFIRM_SCHEMA: ElicitRequestedSchema = {
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"type": "object",
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"properties": {"confirm": {"type": "boolean", "description": "Proceed with the deployment?"}},
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"required": ["confirm"],
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}
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def build_server() -> MCPServer:
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# requestState is sealed by default under a process-local key, which suits this
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# single-process server; fleets share keys=[...] so any instance can verify.
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mcp = MCPServer("mrtr-example")
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@mcp.tool(description="Deploy to an environment, asking the user to confirm first.")
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async def deploy(env: str, ctx: Context) -> str | InputRequiredResult:
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responses = ctx.input_responses
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if responses is None or "confirm" not in responses:
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ask = ElicitRequest(
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params=ElicitRequestFormParams(message=f"Deploy to {env}?", requested_schema=CONFIRM_SCHEMA)
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)
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# The boundary seals this plaintext request_state on the way out and unseals the echo on retry.
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return InputRequiredResult(input_requests={"confirm": ask}, request_state="awaiting-confirm")
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assert ctx.request_state == "awaiting-confirm", ctx.request_state
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answer = responses["confirm"]
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if isinstance(answer, ElicitResult) and answer.action == "accept" and (answer.content or {}).get("confirm"):
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return f"deployed to {env}"
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return f"deployment to {env} cancelled"
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return mcp
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if __name__ == "__main__":
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run_server_from_args(build_server)
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