That's what Compels are for.
Compels solve everything! If the construct is semipermanent or permanent, it could be wise to give it an aspect or two like:
Reliant on Creator and
Soulless Servant. For the stealth oddity,
Big, Stompy Everything if the construct isn't the type for sneaking around.
It's called Beast Change.
It could kinda work, but a modified version of Skilled Projection (possibly attached to an Item of Power) might be more fitting.
Thanks. I don't recall seeing Skilled Projection before. With that low refresh, it certainly is a great way to model a Kid With The Remote Control character. Take it twice or more for an arsenal of contruct buddies. Reminds me of the Artificer from Eberron (D&D), and could model a 'Pokémon trainer' with a sneaky flying construct, a big combat golem and a potion-holding walking Luggage.