Make security "age restricted"

[Dauntasa]

I want a brig designed so that prisoners actually have to use their brains to escape

This is impossible to do.

I'm not being facetious here: it can't be done. There are only two ways it can go: Either there's a way you can break out of the brig without bringing any items in with you, or there isn't. If there is a way, then after you figure it out or hear about it the first time the brig can no longer hold you and throwing you in is a mild inconvenience at best. If there isn't, then the brig is impossible to escape unless security forgets to take your toolbelt.

That's it, those are the two options. Right now we have option A. All you are really suggesting is changing it to option B. There's no actual sliding scale here, it's just A or B. Yeah, you can make A more obscure or B require more tools but those are just fine points: it boils down to either the brig can't hold anyone or the brig is impossible to escape unless security fucks up massively.