Human: Please generate a brief description of a dreary scene inside a keep with a brass pot and a toadstool. Assistant: 
A long, narrow corridor extends east and west. It is an unpretentious corridor, with no carpeting or wall coverings to alleviate the boredom of a granite floor, shored granite walls and a shored granite ceiling. A giant toadstool occupies a brass pot, though the light cast by the toadstool is hardly ample to illuminate the entire corridor. A heavy iron gate occupies a spot in the north wall, and a dim opening yawns in the corridor's east end.