I was first thinking how cool Steelbeak having his literal beak made of steel by F.O.W.L’s work was so awesome..
But at the end of the episode I realized that now they can control him like a puppet, he can't leave them even if he wanted too, they have full control to shut his beak whenever they want? (let me know if I get too morbid with the kids shows, I do it a lot)
You can tell instantly he hated it (Of course).. But he didn’t know they would do this to him? He never agreed to that?
Even though he is still agreeing to work with them and doesn't see the issue, he is stuck in their grasp now, maybe he would leave them one day to be his own single villain? I doubt it, though.
Not gonna lie that's a pretty good detail for us to figure out how F.O.W.L really acts from what little we know of them... Even if it is a bit disturbing.