/**
 * Settings Manager
 *
 * Handles persistent configuration for the NotebookLM MCP Server.
 * Manages profiles, disabled tools, and environment variable overrides.
 */
import { Tool } from "@modelcontextprotocol/sdk/types.js";
export type ProfileName = "minimal" | "standard" | "full";
export interface Settings {
    profile: ProfileName;
    disabledTools: string[];
    customSettings?: Record<string, any>;
}
export declare class SettingsManager {
    private settingsPath;
    private settings;
    constructor();
    /**
     * Load settings from file, falling back to defaults
     */
    private loadSettings;
    /**
     * Sanitize an untrusted customSettings object before it is stored and later
     * spread/merged elsewhere. Strips prototype-pollution vectors
     * ("__proto__"/"constructor"/"prototype"), drops nested objects/arrays
     * (only primitive values are accepted), and bounds the number of keys.
     * Builds the result on a null-prototype object so a poisoned key can never
     * reach Object.prototype.
     */
    private sanitizeCustomSettings;
    /**
     * Save current settings to file
     */
    saveSettings(newSettings: Partial<Settings>): Promise<void>;
    /**
     * Get effective configuration (merging File settings with Env Vars)
     */
    getEffectiveSettings(): Settings;
    /**
     * Filter tools based on effective configuration
     */
    filterTools(allTools: Tool[]): Tool[];
    getSettingsPath(): string;
    getProfiles(): Record<ProfileName, string[]>;
}