Slider tool does not go through CanTool?

Garry's Mod coding
#1

So in my server, I made it so that tools can’t be used on money printers. That means they can’t duplicate it. They can duplicate if it had a constraint, but they can’t use tools so that’s impossible too.

BUT, using the slider tool, a player was somehow able to connect it to the printer. I couldn’t do it when I tried, but it worked for him. Then someone showed me how to do it but I didn’t quite understand how he did it.

Does anyone know how he did it?

#2

He rightclicked on a wall which faces toward the printer. As far as I know, there’s no way to block this without editing the game files.