ExperimentalThe declared ACP MCP server handling the associated request.
The identifier of the active inner MCP request.
The inner MCP method name.
OptionalparamsOptional inner MCP params; null is equivalent to omission.
Optional_ACP extension metadata (not inner MCP params._meta); null is equivalent to omission.
UNSTABLE
Notification for an active request, sent from provider to consumer. Includes subscription acknowledgements and updates.