What is the correct way to tag a broken access ramp (kerb/curb cut)?

First of all, I am mapping for acessibility, in the context of sidewalks being mapped as geometries.

So, kerb cuts can be individually mapped.

But i'm really in doubt about broken ramps (in many different levels of "brokenness").

They (like the one in highlighted in the attached surely can be tagged as:

barrier=kerb kerb=lowered

and also surely, can't be tagged as wheelchair=yes...

we may use smoothness? just add a "description=broken ramp" ? (will face standardization problems, surely)

I really think that a "state_of_convervation" key with values ranging from "100%" (brand new) to 0% (totally destroyed, impassable) shall be a great idea.