Yeah, basically just what it says in the title. In my case, I want to limit the summoning to pretty much exclusively steeds and pets, not just any livestock, wild animal etc (thus a use for a whitelist), but the more pressing issue is stuff like it being possible to summon untamed dragons (among other creatures) from Ice and Fire, potentially teleporting them into killrooms. It'd be great if the player were able to restrict which entities are summonable.

Sure, this is doable! I'll try to have a release out with it included soon.

Awesome! Thanks so much!