{"name":"timezone_convert","title":"Time Zone Converter","category":"developer","description":"Convert an ISO datetime between IANA time zones with correct DST offsets.","price_usd":0.001,"input_schema":{"type":"object","properties":{"datetime":{"type":"string","description":"ISO 8601 datetime"},"from_zone":{"type":"string","description":"Source IANA zone for naive input (default UTC)"},"to_zone":{"type":"string","description":"Target IANA zone, e.g. Asia/Tokyo"}},"additionalProperties":false,"required":["datetime","to_zone"]}}