/**
 * MCP tools: list_labels, add_label, remove_label, create_label, delete_label
 *
 * Provider-aware label management. Automatically detects whether the account
 * uses ProtonMail (folder-based labels), Gmail (X-GM-LABELS), or standard
 * IMAP keywords, and applies the correct strategy.
 */
import type { McpServer } from '@modelcontextprotocol/server';
import type ImapService from '../services/imap.service.js';
export default function registerLabelTools(server: McpServer, imapService: ImapService): void;
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