Although, come to think of it, the suggestion that a stargate-type warp would "take a bite" out of a planet kinda makes sense too, since such a space warp would entail immense energies and gravitational forces. It probably wouldn't be safe to create or operate such a warp on the surface of an inhabited planet, because it could really tear things up in the vicinity.
Actually, what I had in mind was an even simpler interpretation, which is: "The stargate transports anything in its immediate vicinity to xxx location. You can't have it on the surface of a planet because it will transport part of the planet as well-- or at least attempt to. Bad for all concerned."
There's nothing wrong with your phrasing, but mine was intended for a totally non-technical audience.