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Pass InputRequiredResult through the MCPServer prompt and resource pipelines (#3020)

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Max 2026-06-29 17:50:58 +02:00 • committed by GitHub
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@ -181,7 +181,7 @@ The handshake belongs to the runner. `server/discover`, `ping`, and every other
Each of these is one idea you now have the vocabulary for; each has its own chapter.
* `on_call_tool` may return an `InputRequiredResult` instead of a `CallToolResult` to pause the call and ask the client for input; see **[Multi-round-trip requests](multi-round-trip.md)**.
* `on_call_tool`, `on_get_prompt`, and `on_read_resource` may return an `InputRequiredResult` instead of their normal result to pause the call and ask the client for input; see **[Multi-round-trip requests](multi-round-trip.md)**.
* `on_list_resources`, `on_read_resource`, `on_list_prompts`, `on_get_prompt`, `on_completion` are the same `(ctx, params) -> result` shape for the other primitives.
* `server.streamable_http_app()` returns the same Starlette app `MCPServer`'s does; deploy it the way **[Running your server](../run/index.md)** deploys any other ASGI app. There is no `server.run(transport=...)` down here: `server.run(read_stream, write_stream, server.create_initialization_options())` drives one connection over a pair of streams, and that one line is the whole story.