[
  {
    "name": "render_ui",
    "description": "Render an interactive UI resource in the chat. Use the `uri` field to specify the resource type. Supported URIs:\n- `ui://mcp-ui/html` — Render custom HTML/CSS/JS (provide html_content)\n- `ui://mcp-ui/url` — Embed an external URL in an iframe (provide url)\n- `ui://mcp-ui/ask-user` — Present questions with selectable options to the user (provide questions)",
    "inputSchema": {
      "type": "object",
      "properties": {
        "uri": {
          "type": "string",
          "enum": ["ui://mcp-ui/html", "ui://mcp-ui/url", "ui://mcp-ui/ask-user"],
          "description": "Resource URI that determines the rendering mode"
        },
        "title": {
          "type": "string",
          "description": "A descriptive title for the UI widget"
        },
        "html_content": {
          "type": "string",
          "description": "[uri=ui://mcp-ui/html] Complete HTML content to render. Can include inline CSS and JavaScript."
        },
        "url": {
          "type": "string",
          "description": "[uri=ui://mcp-ui/url] External URL to embed in an iframe."
        },
        "width": {
          "type": "string",
          "description": "[uri=ui://mcp-ui/html|url] CSS width for the iframe. Default: '100%'",
          "default": "100%"
        },
        "height": {
          "type": "string",
          "description": "[uri=ui://mcp-ui/html|url] CSS height for the iframe. Default: 'auto'",
          "default": "auto"
        },
        "questions": {
          "type": "array",
          "description": "[uri=ui://mcp-ui/ask-user] Array of questions to ask the user.",
          "items": {
            "type": "object",
            "properties": {
              "question": {
                "type": "string",
                "description": "The question to ask the user"
              },
              "options": {
                "type": "array",
                "minItems": 2,
                "items": { "type": "string" },
                "description": "REQUIRED array with at least 2 options."
              },
              "multi_select": {
                "type": "boolean",
                "description": "If true, the user can select multiple options. Default: false.",
                "default": false
              }
            },
            "required": ["question", "options"]
          }
        }
      },
      "required": ["uri", "title"]
    }
  }
]