Setting aside the ethical concerns, let’s focus on the practical. The AI didn’t play the game. The AI has absolute no idea what is in the game, except what you tell it. And if you’re lazy enough to use AI to write the game description, then you’re almost certainly also lazy enough to not tell the AI about the exact features that the game has and doesn’t have.
The AI isn’t lying, it’s guessing, so telling it not to lie is useless. This isn’t even an AI problem. Hire a human copywriter to write a description of your game, without giving them the actual game, and you will get the same kind of garbage.