Gloves are illegal on Bonaire.
STINAPA - Bonaire National Marine Park So are chemical lightsticks. I'm actually not sure if you can bring a knife either - check with your dive operator there or tour organizer.
Don't pick up any "souvenirs" (shells, coral etc.) either - even if they look dead. It's likely some animals home - or could be. Plus it's illegal anyway and will be confiscated at the airport. And please don't touch the turtles - it makes them nervous.
If you see jellyfish above you, take your alternate and blow bubbles at them. That will usually cause them to move away enough to get past them. I've personally
never seen a jellyfish on Bonaire. We dove all over the island except the east side.
A hood won't do much except make your head hot. The water is going to be 82-84 degrees in summer. My normal "dive attire" is microfiber board shorts and a t-shirt. The microfiber is nice because if there's any breeze, they'll mostly dry before you sit in the truck.
If you're going to be doing repetitive dives you may want a thin wetsuit - over the week your core temperature will reduce slightly and you may feel cold. I'm never cold, my buddy who is uses either a dive skin or a 3mil wetsuit. To save money, if you get cold rent one later in the week.
The skin is a good idea, if there was any jellyfish (or sea wasps - basically the same thing) they can't sting thru it. Also it may help save some skin when you bang into the coral at the shore entry points - everybody does. And some help with sunburn protection.