But isn't your messenger sending this second message also?

So is your messenger in the habit of talking about himself in a possessive third person sense? Or would it make more sense to say "Sorry, I've had too much wine tonight. Don't tell master Vandir, he beats me."

In any case, tells are explained in the helpfiles that it's just a natural and accepted thing that no one gives a second thought. Like multi-deaths, recalling (pre-10), and a lack of defecation.