> If I forgot my keychain at work, is it going to beep the entire night?
No, I don't think so.
As I understand it, the idea is that AirTags would only beep if they detect being moved (probably, accelerometer/motion based, as everything else is probably energy cost-prohibitive). So, no, a forgotten keychain left on a table shouldn't beep on its own, unless someone takes it and carries with themselves for some time. It shouldn't even beep if your coworker notices your keys and moves them to another room for safekeeping.
The idea is that it should eventually alert if you put a tag in someone's back pocket and you or they walk away.
No, I don't think so.
As I understand it, the idea is that AirTags would only beep if they detect being moved (probably, accelerometer/motion based, as everything else is probably energy cost-prohibitive). So, no, a forgotten keychain left on a table shouldn't beep on its own, unless someone takes it and carries with themselves for some time. It shouldn't even beep if your coworker notices your keys and moves them to another room for safekeeping.
The idea is that it should eventually alert if you put a tag in someone's back pocket and you or they walk away.