Moderation to avoid image calls that will fail safety system policy

I’m adding image generation to a discord bot just as a bit of fun for users really. What I would prefer to do is have an explicit filter for when they step over the line and try to submit a prompt that will fail the image safety system policy.

I use the moderation api for the rest of my submissions and have it in place for this one also. The question is what exactly do I need to filter on to correspond with the underlying image api rules?

Really just a list of the categories I should check for would be perfect if anyone knows them.