[
  {
    "name": "render_ui",
    "description": "Render an interactive UI resource in the chat. Use the `uri` field to specify the resource type, and pass all parameters in the `data` object.\n\nSupported URIs:\n- `ui://mcp-ui/html` — Render custom HTML/CSS/JS. data: {html_content, title?, width?, height?}\n- `ui://mcp-ui/url` — Embed an external URL in an iframe. data: {url, title?, width?, height?}\n- `ui://mcp-ui/ask-user` — Present questions with selectable options. data: {questions: [{question, options, multi_select?}], title?}",
    "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"
        },
        "data": {
          "type": "object",
          "description": "Parameters for the specified URI. Structure depends on uri:\n- html: {html_content: string, title?: string, width?: string, height?: string}\n- url: {url: string, title?: string, width?: string, height?: string}\n- ask-user: {questions: [{question: string, options: string[], multi_select?: boolean}], title?: string}",
          "properties": {
            "title": {
              "type": "string",
              "description": "A descriptive title for the UI widget"
            },
            "html_content": {
              "type": "string",
              "description": "[uri=html] Complete HTML content to render. Can include inline CSS and JavaScript."
            },
            "url": {
              "type": "string",
              "description": "[uri=url] External URL to embed in an iframe."
            },
            "width": {
              "type": "string",
              "description": "[uri=html|url] CSS width. Default: '100%'",
              "default": "100%"
            },
            "height": {
              "type": "string",
              "description": "[uri=html|url] CSS height. Default: 'auto'",
              "default": "auto"
            },
            "questions": {
              "type": "array",
              "description": "[uri=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", "data"]
    }
  }
]