Optionalinput_JSON Schema validated against the whole invoke payload, from the automation's input_schema_config. null when none is configured.
OptionalparticipantsNamed participant slots declared by the workflow, sorted by name. null when the workflow declares none. Values supplied under the top-level participants field are agent IDs.
Owner-controlled payload and participant values the platform applies to every invocation. Supplying a conflicting value is rejected.
The schema-driven values an installer may lock when provisioning an invoked automation template.