Will setting -Djboss.modules.system.pkgs affect the JBoss Host Controller?

Issue

In order to install an agent to monitor some AS, I needed to overload the system property "jboss.modules.system.pkgs", which is set in the $JBOSS_HOME/bin/domain.conf
As I didn't want the process and host controller to load the agent's packages, I did some changes by setting the "jboss.modules.system.pkgs" property in the hosts.xml file.
The PC and HC seem to be running well whitout this property. However I'd like to know what are the real impacts of my modification on the PC and HC.