{
  "request": {
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
      "name": "preview_snapshot",
      "arguments": {
        "tabId": "tab-mcp-alternate",
        "save": true
      }
    }
  },
  "response": {
    "jsonrpc": "2.0",
    "id": 2,
    "result": {
      "content": [
        {
          "type": "text",
          "text": "Preview snapshot failed: Could not save preview screenshot to $T3_HOME/userdata/browser-artifacts/browser-screenshot-example-test-mwe4q54n-c1bbf2a8.png."
        }
      ],
      "structuredContent": {
        "error": {
          "_tag": "PreviewScreenshotSaveError",
          "operation": "snapshot",
          "failureCount": 1,
          "message": "Could not save preview screenshot to $T3_HOME/userdata/browser-artifacts/browser-screenshot-example-test-mwe4q54n-c1bbf2a8.png."
        }
      },
      "isError": true
    }
  }
}