Function
request
Send a request to the client on the current SSE response stream. Note that client MCP/JSON-RPC responses arrive as new HTTP requests. Use sessions to await client responses within a handler instance.
https://modelcontextprotocol.io/specification/2025-06-18/client/elicitation
request: func(output: borrow<output-stream>, request: server-request) -> result<_, notification-error>;