To issue a slash command, one needs either a CENTURION, GML or WORLDMOD role. However, most commands require a specific role:
/align : WORLDMOD
/behave : WORLDMOD
/chowner : WORLDMOD
/cloak : GML
/entity : WORLDMOD
/fetch : WORLDMOD
/fit : GML
/fly : WORLDMOD
/gag : GML
/getagentconfig : GML
/getagentmemory : GML
/getagentmissiondetails : GML
/grantagent : GML
/help : (none)
/heal : GML
/loadcontainer : GML
/rename : WORLDMOD
/resetagentmemory : GML
/setagentmissiontested : WORLDMOD
/setqty : WORLDMOD
/setnextagentmission : GML
/spawn : WORLDMOD
/spawnN : WORLDMOD
/transfer : see below
/uncloak : GML
/ungag : GML
/unload : GML
/unspawn : WORLDMOD
/setstanding : GMH
To /transfer characters other than yourself, you need the GML role, to /transfer objects, you need the WORLDMOD role.