Right now... It doesn't, of course.
The plan might change since now i have time to give it a few iterations and i'm not sure about what works and what doesn't - but the general concept would have been that the robot "does its own thing" and you have some actions you can do to "get his attention" and do one thing in a way that helps you.
Things like throwing sth and he fetches it for you, placing/moving objects in the level to change which behaviour he picks, getting him to collect or interact with things...
There might or might not be enemies at some point, in which case the robot might have the weapon.
I have a few ideas and we'll see what sticks