I just want to get out of the way that I completely agree with all of the rules, but I feel that many are plain unnecessary (unless the past game jam caused the rules to be implemented), and I'd suggest leaving them off, not because they're bad rules, but because they're obvious.

Firstly, "Table top RPGs only," of course this is only for tabletop games, if you talk about D&D, of course it's tabletop.

Secondly, "No Nazis, terfs, bigots, etc." I understand what you're going for when saying this, but like, come on man. This is extremely unnecessary and it feels very forced. I remember on a different online community of game designers coming across a tabletop sci-fi RPG, and in the instruction guide it said, "This game is meant for a specific audience only, if you are a Nazi, homophobic, transphobic, racist, or any form of bigotry, get a therapist and fix your mess of a life." No joke. I understand that feeling of wanting to share your frustration with politics at the moment, but I really suggest removing that because it makes you look like you have a specific agenda in mind when running the jam, it doesn't matter if it's a socially accepted view (for clarity I agree with your statement), putting that kind of thing makes it seem like you are not here to run a genuine fun event, and that really sucks because I can see that this Jam is created out of passion.

If I were you, I would change the rule to, "Any form of indecency or harmful political intent is prohibited," or just flat out remove the rule because it's really not a necessary rule to have, it's obvious when something has a harmful political agenda, and you don't need a rule to stop those people, those people would be breaking the guidelines set up by Itch.io (look at community guidelines - rule 1 and 2).