{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "summary": { "type": "string" },
    "sources": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "title": { "type": "string" },
          "url": { "type": "string" },
          "snippet": { "type": "string" }
        },
        "required": ["title", "url", "snippet"]
      }
    }
  },
  "required": ["summary", "sources"]
}