{"name":"date_add","title":"Date Arithmetic (add duration)","category":"developer","description":"Add years/months/weeks/days/hours to an ISO date; month math clamps to end-of-month.","price_usd":0.001,"input_schema":{"type":"object","properties":{"date":{"type":"string","description":"ISO date YYYY-MM-DD or full datetime"},"years":{"type":"integer","description":"Years to add (may be negative)"},"months":{"type":"integer","description":"Months to add (may be negative)"},"weeks":{"type":"integer","description":"Weeks to add (may be negative)"},"days":{"type":"integer","description":"Days to add (may be negative)"},"hours":{"type":"integer","description":"Hours to add (may be negative)"},"minutes":{"type":"integer","description":"Minutes to add (may be negative)"},"seconds":{"type":"integer","description":"Seconds to add (may be negative)"}},"additionalProperties":false,"required":["date"]}}