Neko no Te datte Yaku ni Tatsu - Ch. 238 - Secret Job

[VINT64]

I understand that, and still don't see why it'd be bad; that's bragging chance for her even, lol.

If she tells them she works there, they'll want to come and see how she works. Then it's 1 out of 2: either they say they didn't see her there, or she wears that apron and makes a performance for them

 

[flannan]

What are the laws in Japan concerning cat labor?

Cats are, in theory, pretty clever. But in practice, unlike dogs, cats don't do any work. Except for "jobs" where the requirement is to laze around and look cute.
But you can look up how Tama the station master cat works.