Oofta
Legend
I'm going to be contrarian and say that yes, a roll is needed. The inner part of a gauntlet is not required to be heavy leather, it can be fairly thin. You don't need to add armor to the part of the armor that is never exposed to attack, and you want the person wearing the gauntlet to be able to firmly grasp and feel the sword. Heck, the inside of the gauntlet could be thin cloth for all that it matters to overall protection of the fighter. If a needle can reliably pierce skin, it can pierce the skin of a dead animal.
But the bigger issue is that if you allow this, there's no reason for the rogue to do anything. If the fighter had opened the chest and the needle trap had gone off, it they wouldn't have avoided the trap because of clever play or a good plan. They avoided it because they just make up on the spot that they were wearing heavy gloves.
Then again, I rarely use traps. I never use traps like this because the person triggering the trap can always claim they're using gloves or whatever. When I do use traps it has to be logical to the scenario and be something that would actually work. If the device has a needle trap, it will be delicate enough that you can't open it while wearing heavy gloves for example.
But the bigger issue is that if you allow this, there's no reason for the rogue to do anything. If the fighter had opened the chest and the needle trap had gone off, it they wouldn't have avoided the trap because of clever play or a good plan. They avoided it because they just make up on the spot that they were wearing heavy gloves.
Then again, I rarely use traps. I never use traps like this because the person triggering the trap can always claim they're using gloves or whatever. When I do use traps it has to be logical to the scenario and be something that would actually work. If the device has a needle trap, it will be delicate enough that you can't open it while wearing heavy gloves for example.
"Challenge accepted!" 
