{
  "description": "Load an image into the conversation so you can see it. Call it any time the user references an image — then answer from what you see.",
  "name": "vision_analyze",
  "parameters": {
    "properties": {
      "image_url": {
        "description": "Image URL (http/https), local file path, or data: URL to load.",
        "type": "string"
      },
      "question": {
        "description": "Your question or request about the image.",
        "type": "string"
      },
      "region": {
        "description": "Optional [x1, y1, x2, y2] crop in ORIGINAL-image pixel coordinates, applied before any downscaling — the crop keeps full resolution. Load the full image first, then re-call with a region to zoom into small text or fine detail.",
        "items": {
          "type": "integer"
        },
        "maxItems": 4,
        "minItems": 4,
        "type": "array"
      }
    },
    "required": [
      "image_url",
      "question"
    ],
    "type": "object"
  }
}