/**
 * FlexibleToolValidator - Universal Safety Checks Only
 *
 * Following Anthropic's MCP specification which intentionally leaves tool naming flexible,
 * this validator only blocks truly dangerous cases to support maximum MCP tool compatibility.
 *
 * Phase 1 Implementation:
 * - Universal safety checks only (empty names, control characters, excessive length)
 * - No context-specific validation or arbitrary pattern restrictions
 * - Designed to support ALL legitimate MCP tools (github.create_repo, filesystem.read_file, etc.)
 */
import type { FlexibleValidationResult } from "../types/index.js";
export declare class FlexibleToolValidator {
    private static readonly MAX_TOOL_NAME_LENGTH;
    private static readonly MIN_TOOL_NAME_LENGTH;
    /**
     * Validate tool name with universal safety checks only
     *
     * This method only blocks truly dangerous cases:
     * 1. Empty or whitespace-only names
     * 2. Control characters that could break systems
     * 3. Excessively long names that could cause memory issues
     *
     * Everything else is allowed to support maximum MCP tool compatibility.
     */
    static validateToolName(toolId: string): FlexibleValidationResult;
    /**
     * Validate tool information with minimal safety checks
     */
    static validateToolInfo(toolId: string, toolInfo: {
        description?: string;
        serverId?: string;
    }): FlexibleValidationResult;
    /**
     * Get information about what this validator checks
     */
    static getValidationInfo(): {
        philosophy: string;
        checks: string[];
        whatIsAllowed: string[];
        examples: {
            valid: string[];
            invalid: string[];
        };
    };
}