> You would not start with "The car is functional [...]"

Nope, and a human might not respond with "drive". They would want to know why you are asking the question in the first place, since the question implies something hasn't been specified or that you have some motivation beyond a legitimate answer to your question (in this case, it was tricking an LLM).

Why the LLM doesn't respond "drive..?" I can't say for sure, but maybe it's been trained to be polite.