Tooltips make stealth storages unstealthy

[Maegor]

I don't think that you can put a chainsaw in your pocket, nor that people can see what is in your pocket. And i am pretty sure this is a feature as it says in the wiki:

Starts out appearing like an internals box and can assume the form of pretty much any hand-held item. Unlike a regular box or backpack, using this container does not result in conspicuous text messages, it will however give away its identity upon close examination. The camouflage can be reset at any time if required.