import { z } from 'zod';
import type { ColumnInfo, ConstraintInfo } from './types.js';
export declare const DescribeTableSchema: z.ZodObject<{
    tableName: z.ZodString;
    includeConstraints: z.ZodDefault<z.ZodOptional<z.ZodBoolean>>;
}, "strip", z.ZodTypeAny, {
    tableName: string;
    includeConstraints: boolean;
}, {
    tableName: string;
    includeConstraints?: boolean | undefined;
}>;
export type DescribeTableInput = z.infer<typeof DescribeTableSchema>;
/**
 * Get detailed column-level metadata for a specific table
 *
 * This tool provides:
 * - Column names and data types
 * - Nullable constraints
 * - Data length, precision, scale
 * - Default values
 * - Column comments (semantic hints)
 * - Table constraints (primary key, foreign keys, unique, check)
 *
 * Results are cached for 5 minutes to improve performance.
 *
 * @param input - Table name and options
 * @returns Column metadata and constraints
 */
export declare function describeTable(input: DescribeTableInput): Promise<{
    success: boolean;
    data?: {
        tableName: string;
        columns: ColumnInfo[];
        constraints?: ConstraintInfo[];
    };
    error?: string;
    cached?: boolean;
}>;
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