I think the difference, from the perspective of the regulator, is that a firearm is a tool with a limited scope of use, and that certain firearms (pistols) have a further limited scope of use that makes their existence noxious. In the US, the 2nd amendment makes this a controversial issue -- not so in most other jurisdictions.

Possession of burglary tools or drug paraphernalia is typically a modifier used to punish ill-intent. If I'm a carpenter walking home from work with a saw and hammer in my bag, I'm not going to be arrested for possessing burglar tools. If I'm trespassing on someone's property in the middle of the night with a crowbar, on the other hand, I'll probably be prosecuted for possessing burglar tools.

"Hacker tools" is sort of in the middle. A sysadmin with metasploit on his laptop is no different than a carpenter with his hammer. The Level-1 helpdesk technician pinched for stealing passwords is using it as a tool for doing "bad" things. The complication is that the line between "hacker tool" and "legitimate" software is thin or even overlapping.