import { z } from 'zod';
import { Tool } from '../final-answer.tool';
export declare const HumanLoopSchema: z.ZodObject<{
    prompt: z.ZodDefault<z.ZodString>;
}, "strip", z.ZodTypeAny, {
    prompt: string;
}, {
    prompt?: string | undefined;
}>;
export type HumanLoopArgs = z.infer<typeof HumanLoopSchema>;
/**
 * Tool that pauses execution and asks the human for input.
 */
export declare class HumanLoopTool implements Tool<HumanLoopArgs, string> {
    readonly name = "human_loop";
    readonly description = "Pause and ask the human operator for guidance";
    readonly schema: z.ZodObject<{
        prompt: z.ZodDefault<z.ZodString>;
    }, "strip", z.ZodTypeAny, {
        prompt: string;
    }, {
        prompt?: string | undefined;
    }>;
    forward(args: HumanLoopArgs): Promise<string>;
}