Buckles/belt layout are gacha AF

Invoke with b3lt, 1.1 or 1.0 strength. I would always include (buckles) as well. as that's the name of the game.

After that, this has some success applying to anywhere a "belt" would be, if you invoke that object. You can use belt, but that will just make a belt appear.

Corset

Vest (I would invoke [corset] ) to help it out

Gag ((gag, gagged)) - sorta works

Collar

Thigh Strap

Armor (breastplate pauldrons gauntlets etc) (effect can be subtle)

Cuffs/

etc

Belts/Buckles get stupider the farther out you zoom so keep that in mind.