/**
 * @fileoverview Run a single-statement SELECT against canvas dataframes
 * registered by bls_get_series. Layered SQL gate: framework (single-statement →
 * SELECT only → plan-walk allowlist + denied table functions) plus bridge-layer
 * denial of DuckDB system catalogs. Requires CANVAS_PROVIDER_TYPE=duckdb.
 * @module mcp-server/tools/definitions/bls-dataframe-query
 */
import { z } from '@cyanheads/mcp-ts-core';
import { JsonRpcErrorCode } from '@cyanheads/mcp-ts-core/errors';
export declare const blsDataframeQueryTool: import("@cyanheads/mcp-ts-core").ToolDefinition<z.ZodObject<{
    sql: z.ZodString;
    register_as: z.ZodOptional<z.ZodString>;
    preview: z.ZodOptional<z.ZodNumber>;
    row_limit: z.ZodDefault<z.ZodNumber>;
}, z.core.$strip>, z.ZodObject<{
    columns: z.ZodArray<z.ZodString>;
    row_count: z.ZodNumber;
    rows: z.ZodArray<z.ZodRecord<z.ZodString, z.ZodUnknown>>;
    registered_as: z.ZodOptional<z.ZodString>;
    expires_at: z.ZodOptional<z.ZodString>;
}, z.core.$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.";
}], {
    readonly truncated: z.ZodOptional<z.ZodBoolean>;
    readonly shown: z.ZodOptional<z.ZodNumber>;
    readonly cap: z.ZodOptional<z.ZodNumber>;
    readonly notice: z.ZodOptional<z.ZodString>;
}>;
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