Hello! There are no strict limits. The basic idea is just that the Gods can't fix every problem even if they wanted to, and that their influence - while important - isn't all-powerful. However, as a general guideline, if the Gods are too inactive, they will begin to fade into obscurity, which is something characters would want to avoid. On the other side of it, acts that result in excessive and widespread worship to the detriment of other Gods (stealing their followers, converting multiple villages) would be too much.