If two guardians show up to the party, one of them will probably have to change.
This card is an auto-include, probably over unexpected courage. If you play it for encounter card protection, you will be pretty resilient against treacheries.
Also, you are probably going first to nab bad guys or defeat enemies for allies.
AND even if you don't use it on a first action in a turn, you can use it on the second for an unexpected courage.
HOWEVER if you are in a two+ guardian party, someone probably will need to change this card out for something.
The possibilities of running this card next to Inquiring Mind, mean some investigators will have high quality skill cards.