I say tools inside, unless you plan on selling bags of crack or cigs or greenstuff out of it. 

It would be funny though, if u hit a button and a small bag of white stuff fell out.
Or a bag of fake hemp or maybe something like a small bag of pills with rave on the packet. Your visitors would say WTF.   

Vending machine, trailer park style !    welcome to the mean streets of Los Angeles.
Just an idea. Paint the outside with crime scene tape, a body outline and the faces of a few street sellers. 

Ok, just put the tools inside.