curl --request POST \
  --url 'https://zeus-api.agentspro.cn/node/browser/tool?user_id=user_123' \
  --header 'Content-Type: application/json' \
  --data '{
    "tool_name": "screenshot",
    "tool_args": { "full_page": true },
    "session_id": "sess_456"
  }'

{
  "success": true,
  "result": {
    "screenshot_url": "data:image/png;base64,..."
  }
}

{
  "detail": "Browser extension not connected"
}