Celebrim
Legend
I would say that if this is a likely kind of thing to happen in the game... where gear loadout is required to be this specific... then that needs to be communicated to the players, and they need to document every item they have, or otherwise have some means of tracking this stuff.
Leaving aside that I almost certainly will have told the players that if it isn't on the character sheet it doesn't exist in a D&D style game, if the player is claiming specific elements of the fiction like whether gloves are worn effect the resolution, he's claiming we are in the style of game where they need to document every item they have or otherwise have means of tracking this stuff. The player isn't contesting that we are in that sort of game, they are insisting on it.
Conversely, game systems that don't track every little item the player is carrying also don't care about every little item the player is carrying and use fortune tests that don't depend on fiddly aspects of the fiction. And in those games in any event, it's EXPLICITLY the duty of the player to make any calls on aspects of the character (including gear) that might affect my fiction before the fiction for the scene is tested. It's not incumbent on the GM to make a call of whether I'm A Surgeon or I Have Magic Gloves or I'm a Master of Woodcraft apply to the player intent and are being used in scene resolution. And even then, those game systems won't use the process of play the player in the example is likely hoping for, as "I have magic gloves" would only alter the odds you aren't affected by the trap, and not provide immunity through verisimilitude ("poison won't be absorbed by a non-absorbent glove").