/**
 * PostgreSQL Statistics Tools - Advanced Analysis
 *
 * Top-N, distinct values, frequency distribution, and multi-column summary.
 * 4 tools total.
 */
import type { PostgresAdapter } from "../../postgres-adapter.js";
import type { ToolDefinition } from "../../../../types/index.js";
export declare function createStatsTopNTool(adapter: PostgresAdapter): ToolDefinition;
export declare function createStatsDistinctTool(adapter: PostgresAdapter): ToolDefinition;
export declare function createStatsFrequencyTool(adapter: PostgresAdapter): ToolDefinition;
export declare function createStatsSummaryTool(adapter: PostgresAdapter): ToolDefinition;
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