/**
 * Create a new Notion page with supplied markdown content
 * @param parentPageId The ID of the parent page where the new page will be created
 * @param title The title of the new page
 * @param markdownContent The markdown content for the new page
 * @returns A confirmation message with the new page ID
 */
export declare const handler: (parentPageId: string, title: string, markdownContent: string) => Promise<string>;