import type { ToolResult } from "../types.js";
export type DnsRecordType = "A" | "AAAA" | "ANY" | "CAA" | "CNAME" | "MX" | "NS" | "PTR" | "SOA" | "SRV" | "TXT";
/**
 * DNS lookup with zero external binary dependency.
 * Order: Node system resolver → DNS-over-HTTPS (Google) → composite ANY.
 * dig/nslookup are enhancements only; they must never be required.
 */
export declare function nativeDnsLookup(host: string, record: DnsRecordType): Promise<ToolResult>;