About the “overshares”: You linked to a previous column that mentioned this point, “Sometimes the over-sharing of plans can even come across as suspect — similar to how when someone’s calling in sick with genuine illness, they usually just say, ‘I’m going to be out sick,’ but fakers will generally give you a long list of overly specific symptoms, like they feel they have to convince you.”
It usually isn’t enough to just say you’re out and won’t be responding to messages. You’ve got to give people options for how they can get their issue or request resolved. One of the easiest wins here is to provide alternative contact information. That could mean providing your mobile number while you’re out, or, more commonly, providing the phone number and email of the colleague (or department) that will be covering while you’re away.

I’m out of the office from 11/11 to 11/17 and I will not be checking my emails. It’s likely your note will be swallowed in a sea of inbox banality, never to be seen again. If you require a response, please resend your email after 11/18. For urgent editorial issues, please contact the channel or features editor responsible for that content. If you are Barack Obama, text me bro. We need to talk.
We do it every time we go on vacation or take a sick day. We put up an out-of-office (OOO) message with the date of our return, a colleague’s contact information for urgent needs, and maybe even some details about the destination of our long-awaited vacation.