Great, thank you.
Re which RAs have to be reported to ATC: I had a look again at my company manuals and indeed it also contains that you don't need to report a TCAS RA which does not require a deviation from the clearance.
However in daily pilot life, is there any harm in doing so anyways? The chance seems high to me that most probably in such situations the controller might eventually interfere and try to solve the conflict, so instead of waiting for that to happen and saying "unable - TCAS RA", is there any harm in announcing the RA from the very beginning?
And what do you mean by "nuisance HVR case"?