Every customer interaction is important to showcase your brand personality, and auto-reply messages are no exclusion. That’s why you must make the right use of every opportunity and convert it into a good experience. Automated reply messages help you provide a great customer experience and also sets the right expectation.
Other than that, I keep it simple like most folks here, but back in my younger days I had one that started something like “I am out of the office on vacation until (date). I will not be checking emails, voicemails, (work queue system), or generally thinking about this place at all…”

As a result, our text-based work communication has morphed into a series of strange, stilted, passive aggressive, and performatively upbeat exchanges. Much of the actual text of work email exchanges is ornamental filler language filled with exclamation points and phrases like “just looping back on this” that mask burnout, frustrated obligation, and sometimes outright contempt (the absolute best example of this is a wonderful 2015 post titled, “Just Checking In,” where writers Virginia Heffernan and Paul Ford write fake emails in this vein to see who can cause the other the most panic).
That said, be careful with messages that are this curt. Make sure you're familiar enough with your audience — and your boss, for that matter — to know that this sort of out-of-office message will be met with a snicker, and not with annoyance.