/**
 * Text content item in an MCP call tool result.
 */
interface IMcpUiTextContent {
    type: 'text';
    text: string;
}
/**
 * Image content item in an MCP call tool result.
 */
interface IMcpUiImageContent {
    type: 'image';
    /** Base64-encoded image data. */
    data: string;
    /** MIME type of the image (e.g. "image/png"). */
    mimeType: string;
}
/**
 * Audio content item in an MCP call tool result.
 */
interface IMcpUiAudioContent {
    type: 'audio';
    /** Base64-encoded audio data. */
    data: string;
    /** MIME type of the audio (e.g. "audio/wav"). */
    mimeType: string;
}
/**
 * Embedded resource content item in an MCP call tool result.
 */
interface IMcpUiResourceContent {
    type: 'resource';
    resource: {
        uri: string;
        mimeType?: string;
        text?: string;
        blob?: string;
    };
}
/**
 * A content item in an MCP UI call tool result.
 * Teams currently only renders 'text' content; other types are defined
 * by the MCP spec for forward compatibility.
 */
type IMcpUiCallToolResultContent = IMcpUiTextContent | IMcpUiImageContent | IMcpUiAudioContent | IMcpUiResourceContent;
/**
 * The result of a widget's `tools/call` request, returned by the bot
 * in response to an `htmlwidget/calltool` invoke activity.
 *
 * @experimental This API is in preview and may change in the future.
 * Diagnostic: ExperimentalTeamsHtmlWidget
 */
interface IMcpUiCallToolResult {
    /**
     * An array of content items to return to the widget.
     */
    content?: IMcpUiCallToolResultContent[];
    /**
     * Structured data that the widget can render from.
     */
    structuredContent?: unknown;
    /**
     * Whether the tool call resulted in an error.
     */
    isError?: boolean;
}
/**
 * The wire-format response body for an `htmlwidget/calltool` invoke.
 * Teams expects this shape (with `responseType` discriminator) rather than
 * a bare {@link IMcpUiCallToolResult}.
 *
 * @experimental This API is in preview and may change in the future.
 * Diagnostic: ExperimentalTeamsHtmlWidget
 */
interface IHtmlWidgetCallToolResponse {
    /**
     * Discriminator that tells Teams how to interpret the response.
     */
    responseType: 'htmlwidget/calltoolresult';
    /**
     * The tool call result payload.
     */
    callToolResult: IMcpUiCallToolResult;
}
/**
 * Builds a complete tool result.
 * `content`, `structuredContent` and `isError` are always present, defaulting to `[]`, `{}` and `false`, because an omitted field can reach the widget as `null`.
 *
 * @experimental This API is in preview and may change in the future.
 * Diagnostic: ExperimentalTeamsHtmlWidget
 */
declare function buildCallToolResult(result?: IMcpUiCallToolResult): Required<IMcpUiCallToolResult>;
/**
 * Builds the `htmlwidget/calltool` invoke response body, applying the defaults of {@link buildCallToolResult}.
 *
 * @experimental This API is in preview and may change in the future.
 * Diagnostic: ExperimentalTeamsHtmlWidget
 */
declare function buildCallToolResponse(result?: IMcpUiCallToolResult): IHtmlWidgetCallToolResponse;

export { type IHtmlWidgetCallToolResponse, type IMcpUiAudioContent, type IMcpUiCallToolResult, type IMcpUiCallToolResultContent, type IMcpUiImageContent, type IMcpUiResourceContent, type IMcpUiTextContent, buildCallToolResponse, buildCallToolResult };