The commands for changing, and viewing flags on objects mobiles and locations are oflags, lflags, sflags, pflags, mflags. These allow you to query something by typing oflags <obj>, or to set/unset a flag by typing mflag <mob> true|false List of exactly what flags of each type are available can be gotten by typing list flag_type, eg list oflags. New ones can be defined and old ones removed with undefine. For help on what each flag does, ask one of the gods or higher powers of the mud you intend the zone for, they will be able to answer you. Flags vary from mud to mud.