On the meaning of the term "God"

Is "God" a proper name, or a definite description? If "God" is a definite description, then that definite description is "a being omnipotent, omniscient, and perfectly good," then whatever God does is right, but it also means that we aren't in a position to pick out God unless we are able to identify what good is, and recognize that God possesses that quality. Or, God could be picked out by his exercise of creative power, and then we could define "good" in terms of something being in accordance with whoever possesses maximal creative power. But, if we do that, then don't we end up saying that might makes right?