export declare function hashAgentToolApprovalKey(approvalKey: string): string;
/**
 * An approval key bound to the arguments its call runs with, for a transport
 * that echoes the key back without a server-side approval record to check
 * them against.
 */
export declare function approvalKeyWithArguments(approvalKey: string, argumentsHash: string): string;
export declare function approvalKeyForHistory(approvalKey: string): string;