Ref: Similar concept as that suggested for Groups in https://forums.online-go.com/t/group-categories/11302.
There are ~600? Tournaments of various sorts Open and Active. There's no other way to explore them as far as I can tell. There are already these descriptive categories Tournament Name, When, Time Control, Size, Players, Ranks. However there are other general descriptors of a tournament that might be useful to sort or search on.
Suggest this feature be developed.