/**
 * @fileoverview List the canvas dataframes materialized by bls_get_series,
 * with provenance, TTL, row count, and column schema. Requires
 * CANVAS_PROVIDER_TYPE=duckdb.
 * @module mcp-server/tools/definitions/bls-dataframe-describe
 */
import { z } from '@cyanheads/mcp-ts-core';
import { JsonRpcErrorCode } from '@cyanheads/mcp-ts-core/errors';
export declare const blsDataframeDescribeTool: import("@cyanheads/mcp-ts-core").ToolDefinition<z.ZodObject<{
    name: z.ZodOptional<z.ZodString>;
}, z.core.$strip>, z.ZodObject<{
    dataframes: z.ZodArray<z.ZodObject<{
        name: z.ZodString;
        source_tool: z.ZodString;
        query_params: z.ZodRecord<z.ZodString, z.ZodUnknown>;
        created_at: z.ZodString;
        expires_at: z.ZodString;
        row_count: z.ZodNumber;
        truncated: z.ZodBoolean;
        max_rows: z.ZodOptional<z.ZodNumber>;
        column_schema: z.ZodArray<z.ZodObject<{
            name: z.ZodString;
            type: z.ZodString;
            nullable: z.ZodBoolean;
        }, z.core.$strip>>;
    }, z.core.$strip>>;
}, z.core.$strip>, readonly [{
    readonly reason: "canvas_unavailable";
    readonly code: JsonRpcErrorCode.ServiceUnavailable;
    readonly when: "The DataCanvas service is not configured for this deployment.";
    readonly recovery: "Set CANVAS_PROVIDER_TYPE=duckdb in the server environment and restart to enable dataframe tools.";
}], undefined>;
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