Can I use sage tea as a herb while cooking

I have a bag of loose sage tea, that I do not use for tea. I was wondering whether or not I could use these leaves in my dishes. At first sight, it seems all sage.

Is there a way to know if it is indeed all sage and without any tea leaves? There are no ingredients listed on the bag. Would it be dangerous to cook with, if there was tea in it? My guess is that it would be fine, but might give a nasty flavor.