Human: Please generate a brief description of a foreboding town gate with a guard, a windlass, and a portcullis. Assistant: 
A guard stands just within the iron-banded outer gates, checking travelers as they come through. The high archway leading to the town is guarded by a massive iron portcullis, raised and lowered by a windlass someplace within. Gaps between the logs roofing the foregate passage allow defenders to rain down rocks, hot oil or other, less appealing substances upon would-be intruders.