Letta Tool Payload Example

{
  "id": "tool-sum-01",
  "name": "sum_two",
  "description": "Sum two integers and return the result.",
  "source_type": "python",
  "source_code": "def sum_two(a: int, b: int) -> int:\n    \"\"\"Return a + b.\"\"\"\n    return a + b\n",
  "json_schema": {
    "name": "sum_two",
    "description": "Sum two integers and return the result.",
    "parameters": {
      "type": "object",
      "properties": {
        "a": {"type": "integer", "description": "First addend"},
        "b": {"type": "integer", "description": "Second addend"}
      },
      "required": ["a", "b"]
    }
  },
  "tool_type": "custom",
  "tags": ["math", "example"],
  "created_at": "2026-05-22T10:10:00Z"
}