/**
 * src/gates/tools.ts — tool-list parsing and allowlist validation (pure).
 * Ported verbatim from the ZOB harness safety gates.
 */
import type { HarnessAgent } from "./types.js";
/**
 * Parse a comma-separated tool list into a trimmed, de-duplicated array.
 * Returns `undefined` when the input is empty/absent.
 */
export declare function parseToolList(input: string | undefined): string[] | undefined;
/**
 * Validate requested tools against an agent's declared allowlist. Returns an
 * array of errors (empty array when valid or no tools requested).
 */
export declare function validateToolList(agent: HarnessAgent, requestedTools: string[] | undefined): string[];