My suggestion is to implement a group description under the group title.
Sure, we can elaborate in our group titles, but certain punctuation isn't allowed.
Basically, it would be quite similar to giving descriptions to your dragons, but to the whole group overall instead. Some people have a lore behind why they have grouped certain dragons together, and it would be interesting to know why.
The review process for the group description could be similar as to that of the dragon descriptions.
Or, maybe we could skip that part altogether as long as there is a report button next to the description of the group. It would create slightly more work for the mods, but not as much as another approval service.