{
  "title": "Screen test",
  "human_url": "https://happytails.ai/en/device-tools/screen-test/",
  "agent_url": "https://happytails.ai/agents/en/device-tools/screen-test/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/device-tools/screen-test.md",
  "content": "Screen test\nInspect your screen using solid colors.\nUseful next steps\nWebcam test\nPreview your webcam in the browser.\nMicrophone test\nCheck the input level from your microphone.\nKeyboard test\nCheck which key and modifier signals your browser receives.\nHow to use Screen test\nChoose a test color.\nInspect the colored area, or choose Full screen for a larger view.\nTry the other colors. Press Escape to leave full-screen mode.\nWhat to expect\nInspect your screen using solid colors. Look for pixels that stay a different color as you switch backgrounds. This is a visual inspection, not an automatic hardware diagnosis.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Webcam test Preview your webcam in the browser.",
      "url": "https://happytails.ai/en/device-tools/webcam-test/"
    },
    {
      "name": "Microphone test Check the input level from your microphone.",
      "url": "https://happytails.ai/en/device-tools/microphone-test/"
    },
    {
      "name": "Keyboard test Check which key and modifier signals your browser receives.",
      "url": "https://happytails.ai/en/device-tools/keyboard-test/"
    }
  ],
  "tool": {
    "id": "screen-test",
    "category": "device-tools",
    "built": true,
    "requirements": "Fullscreen solid colors, keyboard exit and display instructions; no guaranteed diagnosis.",
    "implementation": {
      "fields": [],
      "input": false,
      "note": "Choose a color and inspect your display. This is a visual inspection, not automatic hardware diagnosis.",
      "experience": {
        "automatic": false,
        "single": false,
        "label": "Your text",
        "placeholder": "Type or paste your input…",
        "help": "Up to 1,000,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": true
    },
    "execution": "Browser interface",
    "api": null,
    "browser_agent": {
      "supported": false,
      "name": null,
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Screen test\n\n- Human page: https://happytails.ai/en/device-tools/screen-test/\n- Markdown: https://happytails.ai/en/device-tools/screen-test.md\n- Structured JSON: https://happytails.ai/agents/en/device-tools/screen-test/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `screen-test` |\n| Category | device-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | Not callable through HTTP. |\n| Browser-agent interface | No callable WebMCP interface. |\n\n### Implementation notes\n\nChoose a color and inspect your display. This is a visual inspection, not automatic hardware diagnosis.\n\n### Inputs and settings\n\nNo free-text input is required. Use the file inputs and/or settings below.\n\nNo additional settings are declared for this tool.\n\n### Planning specification\n\nFullscreen solid colors, keyboard exit and display instructions; no guaranteed diagnosis.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"screen-test\",\n  \"category\": \"device-tools\",\n  \"built\": true,\n  \"requirements\": \"Fullscreen solid colors, keyboard exit and display instructions; no guaranteed diagnosis.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"input\": false,\n    \"note\": \"Choose a color and inspect your display. This is a visual inspection, not automatic hardware diagnosis.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"label\": \"Your text\",\n      \"placeholder\": \"Type or paste your input…\",\n      \"help\": \"Up to 1,000,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": true\n  },\n  \"execution\": \"Browser interface\",\n  \"api\": null,\n  \"browser_agent\": {\n    \"supported\": false,\n    \"name\": null,\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nInspect your screen using solid colors.\n\n## Useful next steps\n\n- [Webcam test](https://happytails.ai/en/device-tools/webcam-test/): Preview your webcam in the browser. ([Markdown](https://happytails.ai/en/device-tools/webcam-test.md))\n\n- [Microphone test](https://happytails.ai/en/device-tools/microphone-test/): Check the input level from your microphone. ([Markdown](https://happytails.ai/en/device-tools/microphone-test.md))\n\n- [Keyboard test](https://happytails.ai/en/device-tools/keyboard-test/): Check which key and modifier signals your browser receives. ([Markdown](https://happytails.ai/en/device-tools/keyboard-test.md))\n\n## How to use Screen test\n\n1. Choose a test color.\n2. Inspect the colored area, or choose Full screen for a larger view.\n3. Try the other colors. Press Escape to leave full-screen mode.\n\n## What to expect\n\nInspect your screen using solid colors. Look for pixels that stay a different color as you switch backgrounds. This is a visual inspection, not an automatic hardware diagnosis.\n"
}