import { MCPClientManager, MCPTool } from './mcp-client-manager.js';
import { ApprovalService } from './approval.js';
import { GuardrailsService } from '../guardrails/service.js';
export interface FunctionDefinition {
    name: string;
    description: string;
    parameters: Record<string, unknown>;
}
export interface FunctionCallResult {
    success: boolean;
    needsApproval?: boolean;
    approvalId?: string;
    data?: unknown;
    error?: string;
    message?: string;
}
export declare class FunctionBridge {
    private mcpManager;
    private approvalService;
    private trustedTools;
    private trustedToolsByServer;
    private ajv;
    private toolSchemas;
    private approvalMode;
    private guardrailsService?;
    constructor(mcpManager: MCPClientManager, approvalService: ApprovalService, trustedTools?: string[], approvalMode?: 'always' | 'trusted' | 'never', trustedToolsByServer?: Record<string, string[]>, guardrailsService?: GuardrailsService);
    /**
     * A global trusted-tools list containing '*' trusts nothing: the global list is
     * matched literally in handleFunctionCall, so every call still hits the approval
     * gate. That fail-closed behaviour is deliberate — honouring a global wildcard
     * would silently switch off every approval prompt on upgrade — but it is invisible
     * to a user who believes they disabled the prompts, so say so loudly instead.
     */
    private warnIfGlobalWildcard;
    getFunctionDefinitions(): Promise<FunctionDefinition[]>;
    private convertMCPToolToFunction;
    private validateToolArguments;
    handleFunctionCall(duckName: string, functionName: string, args: Record<string, unknown>): Promise<FunctionCallResult>;
    private extractServerFromFunctionName;
    private extractToolFromFunctionName;
    isToolAvailable(serverName: string, toolName: string): Promise<boolean>;
    getAvailableToolsByServer(): Promise<Record<string, MCPTool[]>>;
    updateTrustedTools(trustedTools: string[], trustedToolsByServer?: Record<string, string[]>): void;
    getStats(): {
        totalFunctions: number;
        serverCount: number;
        trustedToolCount: number;
        connectedServers: string[];
    };
}
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