Handler for sampling/createMessage; receives the typed
CreateMessageRequest params and returns the typed CreateMessageResult.
Null => unsupported (the client answers roots/list-style with
Method not found). The SDK validates the request's tool-result message
constraints (client/sampling §Error Handling) before invoking this.
Handler for sampling/createMessage; receives the typed CreateMessageRequest params and returns the typed CreateMessageResult. Null => unsupported (the client answers roots/list-style with Method not found). The SDK validates the request's tool-result message constraints (client/sampling §Error Handling) before invoking this.