{"name":"hvac_cost_estimator","title":"HVAC Cost Estimator","category":"trades","description":"Ballpark HVAC equipment+install from tonnage, system type, efficiency, and complexity. Not a bid.","price_usd":0.002,"input_schema":{"type":"object","properties":{"tons":{"type":"number","description":"System size in tons (default 3)"},"system_type":{"type":"string","description":"central_ac | furnace | heat_pump | package (default heat_pump)","enum":["central_ac","furnace","heat_pump","package"]},"efficiency":{"type":"string","description":"standard | high | premium (default standard)","enum":["standard","high","premium"]},"install_complexity":{"type":"string","description":"simple | moderate | complex (default moderate)","enum":["simple","moderate","complex"]}},"additionalProperties":false}}