Spy drones

I generally did not bother asking, but lately I’m finding more and more fun in using interceptors and I’m usually that kind of player that even when not in a team likes to help teammates (with command modules for example), in fact I always keep one module to help myself (electronic warfare) and one to help them.

So, my question is, what do Spy drones exactly do? I’m using them but still can’t understand, when a friend kills an enemy on which I used Spy drone module, I get assist with that module. So is it a kind of debuff/team oriented module?

You can use them on an enmey stealth ships so it cant use the stealth.

Oh well nice, thanks Error!