"Play Ringtone" does not stop
At least on some devices the action "Play Ringtone" does not stop playing the ringtone until Tasker is disabled or quit.
The action "Play Music" is not always a good alternative because it changes %MTRACK which can be used to trigger music playing causing unwanted profiles to become active.
So an action to stop the ringtone playing would be necessary or the ringtone should stop playing by itself after one loop or a configurable time.