/**
 * @fileoverview Defines the core logic, schemas, and types for the `echo_message` tool.
 * This module includes input validation using Zod, type definitions for input and output,
 * and the main processing function that handles message formatting and repetition.
 * @module src/mcp-server/tools/echoTool/logic
 */
import { z } from "zod";
import { type RequestContext } from "../../../utils/index.js";
/**
 * Defines the valid formatting modes for the echo tool operation.
 */
export declare const ECHO_MODES: readonly ["standard", "uppercase", "lowercase"];
/**
 * Zod schema defining the input parameters for the `echo_message` tool.
 * This schema is used by the MCP SDK to validate the arguments provided when the tool is called.
 */
export declare const EchoToolInputSchema: z.ZodObject<{
    message: z.ZodString;
    mode: z.ZodDefault<z.ZodOptional<z.ZodEnum<["standard", "uppercase", "lowercase"]>>>;
    repeat: z.ZodDefault<z.ZodOptional<z.ZodNumber>>;
    timestamp: z.ZodDefault<z.ZodOptional<z.ZodBoolean>>;
}, "strip", z.ZodTypeAny, {
    repeat: number;
    message: string;
    timestamp: boolean;
    mode: "standard" | "uppercase" | "lowercase";
}, {
    message: string;
    repeat?: number | undefined;
    timestamp?: boolean | undefined;
    mode?: "standard" | "uppercase" | "lowercase" | undefined;
}>;
/**
 * TypeScript type inferred from `EchoToolInputSchema`.
 * Represents the validated input parameters for the echo tool.
 */
export type EchoToolInput = z.infer<typeof EchoToolInputSchema>;
/**
 * Zod schema for the successful response of the `echo_message` tool.
 */
export declare const EchoToolResponseSchema: z.ZodObject<{
    originalMessage: z.ZodString;
    formattedMessage: z.ZodString;
    repeatedMessage: z.ZodString;
    mode: z.ZodEnum<["standard", "uppercase", "lowercase"]>;
    repeatCount: z.ZodNumber;
    timestamp: z.ZodOptional<z.ZodString>;
}, "strip", z.ZodTypeAny, {
    originalMessage: string;
    mode: "standard" | "uppercase" | "lowercase";
    formattedMessage: string;
    repeatedMessage: string;
    repeatCount: number;
    timestamp?: string | undefined;
}, {
    originalMessage: string;
    mode: "standard" | "uppercase" | "lowercase";
    formattedMessage: string;
    repeatedMessage: string;
    repeatCount: number;
    timestamp?: string | undefined;
}>;
/**
 * Defines the structure of the JSON payload returned by the `echo_message` tool.
 */
export type EchoToolResponse = z.infer<typeof EchoToolResponseSchema>;
/**
 * Processes the core logic for the `echo_message` tool.
 * It takes validated input parameters, formats the message according to the specified mode,
 * repeats it as requested, and optionally adds a timestamp to the response.
 *
 * @param params - The validated input parameters for the echo tool.
 * @param context - The request context, used for logging and tracing the operation.
 * @returns A promise that resolves with an object containing the processed response data.
 */
export declare function echoToolLogic(params: EchoToolInput, context: RequestContext): Promise<EchoToolResponse>;