Acts
From MUME
With acts, you can tell others what you are up to at the moment. Usually when people see you in the room they see:
Gandalf is standing here.
Using acts you can do the following:
> acts making fancy smoke-rings
and people will see:
Gandalf is standing here making fancy smoke-rings.
To turn the acts text off, just type "acts". The string will be reset automatically when you sit, stand, ride, move, and a bunch of other "active" things.
Abusing acts to give misleading information might lead to punishment.