The same detail — nails darkened with dirt — can mean completely different things depending on the situation.
At a formal dinner with no sign of labor? It might suggest poor hygiene.
At the end of a long shift on a construction site? It likely shows dedication.
During volunteer work cleaning after a flood? It reflects service.
On a parent who just repaired a broken fence? It shows responsibility.
Without context, judgment easily turns into assumption.
damaged damaged nail without manicure with dirt close-up. Nail Health Care.

So what do you call someone with nails like that?
There isn’t a single fair answer.
You might call them:
A worker
A builder
A provider
Someone who just finished a demanding day
Or yes, in some situations, someone who could improve their hygiene habits
But you cannot know which one it is without understanding their story.
And that’s the point.