"Break" keyword does not specify damage type

Hello, nowhere in the game it is specified that Armour Break can only be caused by physical damage. I had to search extensively online and test with Avatar of Fire Keystone in-game to find this out.

Armour Break benefiting physical damage does not make it obvious that it can only be caused by physical damage, due to notable passives like The Molten One's Gift.

For the "Armour Break" keyword, please specify that breaking can only be caused by physical damage.

It's not specified in the keyword because it's specified in the sources for Armour Break.
Where it's not specified to be only caused by Physical damage, it isn't.

Armour break not from physical damage is limited to only a few sources, though. From what I can see, it's two low-level uniques, and the Warbringer's ascendancy passive Anvil's Weight.