import type { Approval } from "#public/definitions/approval.js";
/**
 * Returns an `approval` callback that always requires user approval before
 * the tool executes.
 */
export declare function always<TInput = unknown>(): Approval<TInput>;
/**
 * Returns an `approval` callback that never requires user approval before
 * the tool executes.
 */
export declare function never<TInput = unknown>(): Approval<TInput>;
/**
 * Returns an `approval` callback that requires approval until the user
 * approves this tool once in the current session. A tool is recorded as
 * approved only on an explicit approval; a denial (or continuing without
 * responding) leaves it unrecorded, so the next call prompts again. Keys off
 * the bare tool name, so it ignores compound approval keys.
 */
export declare function once<TInput = unknown>(): Approval<TInput>;