/**
 * @fileoverview Describe the tables and columns staged on a DataCanvas by water_get_series or
 * water_find_sites.
 * Use before water_dataframe_query to discover table names and schema.
 * @module mcp-server/tools/definitions/water-dataframe-describe.tool
 */
import { z } from '@cyanheads/mcp-ts-core';
import { JsonRpcErrorCode } from '@cyanheads/mcp-ts-core/errors';
export declare const waterDataframeDescribe: import("@cyanheads/mcp-ts-core").ToolDefinition<z.ZodObject<{
    canvas_id: z.ZodString;
}, z.core.$strip>, z.ZodObject<{
    tables: z.ZodArray<z.ZodObject<{
        name: z.ZodString;
        kind: z.ZodEnum<{
            table: "table";
            view: "view";
        }>;
        row_count: z.ZodNumber;
        columns: z.ZodArray<z.ZodObject<{
            name: z.ZodString;
            type: z.ZodString;
            nullable: z.ZodBoolean;
        }, z.core.$strip>>;
    }, z.core.$strip>>;
    canvas_id: z.ZodString;
}, z.core.$strip>, readonly [{
    readonly reason: "canvas_disabled";
    readonly code: JsonRpcErrorCode.InvalidRequest;
    readonly when: "DataCanvas is not enabled on this server instance.";
    readonly recovery: "DataCanvas is not available on this server instance; read the data directly instead — water_get_series returns the most recent records inline, and water_find_sites pages its matches with limit/offset.";
}, {
    readonly reason: "canvas_not_found";
    readonly code: JsonRpcErrorCode.NotFound;
    readonly when: "The canvas_id does not exist or has expired.";
    readonly recovery: "Re-run the tool that staged the data — water_get_series or water_find_sites — to stage it again and get a fresh canvas_id.";
    readonly thrownBy: "service";
}], undefined>;
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