/**
 * MCP Tool Registry - Extended Registry with Tool Management
 * Updated to match industry standard camelCase interfaces
 */
import type { MCPServerInfo, ToolImplementation, ToolInfo, ExecutionContext, HITLManager } from "../types/index.js";
import { MCPRegistry } from "./registry.js";
export declare class MCPToolRegistry extends MCPRegistry {
    private tools;
    private toolImplementations;
    private toolExecutionStats;
    private builtInServerInfos;
    private hitlManager?;
    constructor();
    /**
     * Set HITL manager for human-in-the-loop safety mechanisms
     * @param hitlManager - HITL manager instance (optional, can be undefined to disable)
     */
    setHITLManager(hitlManager?: HITLManager): void;
    /**
     * Get current HITL manager
     */
    getHITLManager(): HITLManager | undefined;
    /**
     * Register all direct tools from directAgentTools
     */
    private registerDirectTools;
    /**
     * Register a server with its tools - ONLY accepts MCPServerInfo (zero conversions)
     */
    registerServer(serverInfo: MCPServerInfo, context?: ExecutionContext): Promise<void>;
    registerServer(serverId: string, serverConfig?: unknown, context?: ExecutionContext): Promise<void>;
    /**
     * Execute a tool with enhanced context and automatic result wrapping
     *
     * This method handles both raw return values and ToolResult objects:
     * - Raw values (primitives, objects) are automatically wrapped in ToolResult format
     * - Existing ToolResult objects are enhanced with execution metadata
     * - All results include execution timing and context information
     *
     * @param toolName - Name of the tool to execute
     * @param args - Parameters to pass to the tool execution function
     * @param context - Execution context with session, user, and environment info
     * @returns Promise resolving to ToolResult object with data, metadata, and usage info
     * @throws Error if tool is not found or execution fails
     *
     * @example
     * ```typescript
     * // Tool that returns raw value
     * const result = await toolRegistry.executeTool("calculator", { a: 5, b: 3, op: "add" });
     * // result.data === 8, result.metadata contains execution info
     *
     * // Tool that returns ToolResult
     * const result = await toolRegistry.executeTool("complexTool", { input: "test" });
     * // result is enhanced ToolResult with additional metadata
     * ```
     */
    executeTool<T = unknown>(toolName: string, args?: unknown, context?: ExecutionContext): Promise<T>;
    /**
     * List all available tools (updated signature with filtering)
     */
    listTools(): Promise<ToolInfo[]>;
    listTools(context: ExecutionContext): Promise<ToolInfo[]>;
    listTools(filter: {
        category?: string;
        serverId?: string;
        serverCategory?: string;
        permissions?: string[];
        context?: ExecutionContext;
    }): Promise<ToolInfo[]>;
    private resolveToolExecutionTarget;
    private createExecutionContext;
    /**
     * Get tool information with server details
     */
    getToolInfo(toolName: string): {
        tool: ToolInfo;
        server: {
            id: string;
        };
    } | undefined;
    /**
     * Update execution statistics
     */
    private updateStats;
    /**
     * Get execution statistics
     */
    getExecutionStats(): Record<string, {
        count: number;
        averageTime: number;
        totalTime: number;
    }>;
    /**
     * Clear execution statistics
     */
    clearStats(): void;
    /**
     * Get built-in servers
     * @returns Array of MCPServerInfo for built-in tools
     */
    getBuiltInServerInfos(): MCPServerInfo[];
    /**
     * Get tools by category
     */
    getToolsByCategory(category: string): ToolInfo[];
    /**
     * NL-001: Get available tools, filtering out those with OPEN circuit breakers.
     * Returns both the filtered tools and the list of unavailable tool names.
     */
    getAvailableTools(circuitBreakers: Map<string, import("../utils/errorHandling.js").CircuitBreaker>): {
        tools: ToolInfo[];
        unavailableTools: string[];
    };
    /**
     * Check if tool exists
     */
    hasTool(toolName: string): boolean;
    /**
     * Register a tool with implementation directly
     * This is used for external MCP server tools
     */
    registerTool(toolId: string, toolInfo: ToolInfo, toolImpl: ToolImplementation): Promise<void>;
    /**
     * Remove a tool
     */
    removeTool(toolName: string): boolean;
    /**
     * Get tool count
     */
    getToolCount(): number;
    /**
     * Get comprehensive statistics
     */
    getStats(): {
        totalServers: number;
        totalTools: number;
        serversByCategory: Record<string, number>;
        toolsByCategory: Record<string, number>;
        executionStats: Record<string, {
            count: number;
            averageTime: number;
            totalTime: number;
        }>;
    };
    /**
     * Unregister a server
     */
    unregisterServer(serverId: string): boolean;
}
export declare const toolRegistry: MCPToolRegistry;
export declare const defaultToolRegistry: MCPToolRegistry;