Mojang has added armadillos to the game but in their fear of little crying karens they made the armadillo drop its armor plates on its own or by "gently" prying them off with a brush.
There's nothing humane about this treatment of the animal no matter how soft of a feather you use, so this mod comes to the armadillos rescue.
The mod makes 3 changes to the armadillo. First it removes the cruel feathery brushing treatment, second it removes the automatic scute drop (as if they lay their armor like eggs...) and last it adds the scute to the loot table so they're dropped on death.
If you want to adorn your tamed creatures in this highly valued resource, you're gonna have to put in the work for it.