This read-create object triggers an action, such as start or clear, on a given timeline specification, and per the desc a timeline that has already been successfully captured must be cleared through this object before a new capture can be started. It's the operational control an admin uses to actually begin or reset a timeline data collection. For example, after reviewing a completed timeline's samples via p2mpTlValue entries, the admin sets p2mpTlAction to clear before reusing the same specification for another capture.