/**
 * Options for masking sensitive fields
 */
export interface MaskOptions {
    sensitiveFields?: string[];
    replacement?: string;
}
/**
 * Masks sensitive fields in an object or array
 *
 * This function recursively traverses the data structure and replaces
 * values of sensitive fields with a redaction message. This prevents
 * secrets from appearing in MCP client logs while maintaining the
 * structure of the response for AI consumption.
 *
 * @param data - The data to mask (object, array, or primitive)
 * @param options - Optional configuration for which fields to mask and replacement text
 * @returns A new object/array with sensitive fields masked
 */
export declare function maskSensitiveFields(data: any, options?: MaskOptions): any;
/**
 * Checks if an object contains any sensitive fields
 *
 * @param data - The data to check
 * @param sensitiveFields - Optional list of sensitive field names
 * @returns True if sensitive fields are found, false otherwise
 */
export declare function containsSensitiveFields(data: any, sensitiveFields?: string[]): boolean;
/**
 * Gets a list of sensitive field names found in the data
 *
 * @param data - The data to analyze
 * @param sensitiveFields - Optional list of sensitive field names
 * @returns Array of sensitive field names found
 */
export declare function getSensitiveFieldNames(data: any, sensitiveFields?: string[]): string[];