There is the canon example which says that "the family of a klingon warrior is responsible..".

However I was wondering whether it could have the additional positive meaning of {reH vum yaSvetlh. ngoy'qu'} for "That officer is always working. He is very responsible".

Or maybe even the additional negative meaning of {reH Qong yaSvetlh. ngoy'Ha'} for "That officer is always sleeping. He is irresponsible".

You're asking about the different senses of the English word responsible. The canonical example means accountable; another sense means dependable. The question is, does ngoy' mean both of those?

The answer is, we don't know. We only know of the accountable meaning for sure. There has been no example of the dependable meaning, and no further explanation of the Klingon word.

-- 
SuStel
http://trimboli.name