code: public Result<Void> addDescription(AuthzTrans trans, String ns, String name, String description) {
  		try {
  			getSession(trans).execute(UPDATE_SP + TABLE + " SET description = '" 
  				+ description + "' WHERE ns = '" + ns + "' AND name = '" + name + "';");
  		} catch (DriverException | APIException | IOException e) {
  			reportPerhapsReset(trans,e);
  			return Result.err(Result.ERR_Backend, CassAccess.ERR_ACCESS_MSG);
  		}
  
  		Data data = new Data();
  		data.ns=ns;
  		data.name=name;
  		wasModified(trans, CRUD.update, data, "Added description " + description + " to role " + data.fullName(), null );
  		return Result.ok();
  	}
docs: Add description to role
  
  @param trans
  @param ns
  @param name
  @param description
  @return