When using a damaged knife to open a tin of food, sharpen sticks, gathering bark etc, I think it would be a good feature if this had a chance of causing a bleed based on the damage level of the knife, so a badly damaged knife has more chance of causing a bleed than a damaged one. Using a pristine knife would be the only way to 100% guarantee you don't cause a bleed.

The idea is that the damaged knife may slip when in use.

Could maybe apply to all sharp tools?

Maybe something like a 1 in 6 chance of happening with a damaged knife, maybe 1 in 4 chance with a badly damaged knife?

I'd also suggest opening ring-pull tins also has the same chances of causing a bleed, based on the damage level of the tin.

cheers!