/**
 * postgres-mcp - Tool Filtering System
 *
 * Parses and applies tool filter rules from environment variables.
 * Compatible with db-mcp filtering syntax.
 *
 * Syntax:
 *   -group    → Disable all tools in a group
 *   +group    → Enable all tools in a group
 *   -tool     → Disable a specific tool
 *   +tool     → Enable a specific tool (after group disable)
 */
import type { ToolGroup, ToolFilterConfig, ToolDefinition } from "../types/index.js";
/**
 * Default tool groups and their member tools.
 * This serves as the canonical mapping of tools to groups.
 */
export { TOOL_GROUPS } from "./tool-constants.js";
/**
 * Get all tool names from all groups (cached)
 */
export declare function getAllToolNames(): string[];
/**
 * Get the group for a specific tool (O(1) lookup)
 */
export declare function getToolGroup(toolName: string): ToolGroup | undefined;
/**
 * Derive the set of enabled ToolGroup names from a set of enabled tool names.
 * A group is considered enabled if at least one of its tools is in the set.
 */
export declare function getEnabledGroups(enabledTools: Set<string>): Set<ToolGroup>;
/**
 * Check if a name is a valid tool group
 */
export declare function isToolGroup(name: string): name is ToolGroup;
/**
 * Parse a tool filter string into structured rules
 *
 * @param filterString - The filter string (e.g., "starter" or "-vector,-postgis,+pg_vector_search")
 * @returns Parsed filter configuration
 */
export declare function parseToolFilter(filterString: string | undefined): ToolFilterConfig;
/**
 * Filter a list of tool definitions based on filter configuration
 */
export declare function filterTools(tools: ToolDefinition[], config: ToolFilterConfig): ToolDefinition[];
/**
 * Get the tool filter from environment variable
 */
export declare function getToolFilterFromEnv(): ToolFilterConfig;
/**
 * Generate a summary of the current filter configuration
 */
export declare function getFilterSummary(config: ToolFilterConfig): string;
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