@OSUCCESS 

@osuccess <object> [=<message>]. The @osuccess message, prefixed by 
the player's name, is shown to others when the player successfully 
uses <object>. Without a message argument, it clears the @osuccess 
message. It can be abbreviated @osucc. <object> can be specified as 
<name> or #<number>, or as 'me' or 'here'. 

See also @SUCCESS.