import { z } from "zod";
/**
 * `employer_id` on every household tool (1.15.0). The API defaults it to the
 * household the key belongs to, so a single-household caller never needs it.
 * Do not make it required again: list_employees is the only place an agent
 * can learn it, and a required parameter it cannot fill stops the flow.
 *
 * Shared, never copied: a tool registered from its own module imports it
 * here, so a change reaches every tool.
 */
export declare const EMPLOYER_ID_OPTIONAL: z.ZodOptional<z.ZodString>;