I'm not sure. Maybe a support script, and then have something where if you hold a weapon and say some command, it sets it in a preference file for your server to read. Also, maybe a server pref that decides the fate of the weapon or tool, whether it won't let you fire or alt fire but keep it out, whether it forces you to unmount it and close the tools tab (like pressing Q), or removing the item from your inventory altogether.
If you have any other ideas on how to make this easier or more convenient, go ahead and say it.