This is, imo, beside the point.
I exist before any progeny I might have; that doesn't mean that the kids will be just 'tools'.
As for the tool part... Personally, I don't think I naysaid that; on the other hand, I agree fully.
Forgive me for going technical, but... the Ring is like a supercharger; it takes the power a thing has and amplifies it. But yet it has something more than an automated function, or at least certain characters seem to think it does; it's not just a missile heading for the target (Sauron).