This doesn't work. I've gotten many bad reviews, because people thought I was being "curt" or "mean" because I was replying to their question with short replies. None, of my emails were intended to be mean, I just didn't see the point in fluffing up my emails, and only responded with the required information, but I guess people require the fluff or they get their feelings hurt.
"Fluff" is a highly subjective term. What may be fluff for you could be critical signalling for others. Stripping everything down to the bare-bones of what you (or I) may think answers the request sounds intentionally flippant and dismissive. If we fail to address the recipient in a context they understand and share with us that is taken as an offense.
With a little effort, however, it is totally possible to be cogent, compact, AND polite.