Yea but a tag system will allow it to be seen from outside the community. a general requirement in the body of the post of disclosing if AI was used and how I think would go a long way better in the long run, and requires the person to have entered the post and read it first.
I think I'm leaning more towards that style instead. if something interests me I can join it read it and if its AI and I don't want to see it I can go elsewhere, that requires people to put bare amount of effort instead of just seeing a [AI] tag from all[/active/hot] (idk what the actual lemmy endpoint is I use tess) and being like "oh ai downvote"