Currently there isn't support to use glob syntax for file tagging. This is a definite requirement for a version 1.
I believe this is addressed in
https://hg.code.netlandish.com/~petersanchez/tago/rev/442058d39369a8fa926befe530fcfddc9aa01b41
I chose not to include it in clear, delete commands for the potential for mistakes. Maybe that's a mistake? I'll let the community decide