I'd go with a Personal Defense (i.e. Melee) License for blades/batons and a Firearms License for all guns (you'd simply add "classes" to the single license to show what you're qualified to carry, much like Motorcycles are a class on your Driver's License). Exotic weapons (bows, crossbows, etc.) would require specific licenses, as well as the non-Forbidden grenades. Grapple guns, B&E tools, etc. would be "Job Permits". In other words, you'd need to have licensed proof that you work in an industry that requires such tools.