|Arguments||Read||when triggered by schedule|
|specific platform event arguments when triggered by platform event|
|when triggered manually|
|when triggered by HTTP|
|Entity||Read||The name of the entity that triggered the automation: Http, Job, Manual, or platform event's entity.|
|Event||Read||The name of the event that triggered the automation: HTTP method when triggered by HTTP, Trigger when manual, Executed when scheduled, or platform event name.|
|TriggeredBy||Read||User who triggered the event.|
Attempts to cancel the current event and return the provided message as the error/cause of the cancellation. Note that not all events are cancellable and when a non-cancellable event is attempted to be cancelled, the automation will log an exception and stop processing, but other event handlers will continue to process.