I would find that a bit annoying as I join lots of PFs daily and they all have descriptions (otherwise I would not have joined them!) so it would be accepting an extra buttonpress every time while rushing to fight Odin or an S-rank mob. I'd only accept it if it was an option the leader had to manually require.

This is actually a disadvantage for non-JP players though as the nature of the languages means that you can fit an entire full-length description of the content on the main PF interface in Japanese whereas in English/French/German you might get 2-3 words at most and have to actually open the box to read the information properly. So I think it's easier to end up with people who forgot to read the full description in non-Japanese groups, for no reason other than a quirk of language.