What happens if you break the tail off an enemy?

I'm having a hard time finding anything on this online. Does it weaken attacks? Increase rng? Both?

If my memory is correct breakable parts drop extra loot and they have their own lootables capable of dropping things that won't fall from the main body. It will also reveal a weak spot in some cases too don't ask me about NGS though as I don't know if they made any changes.

Some bosses, if you break a part off of them, they lose the related attack.