/**
 * @fileoverview Discover valid field values with study counts from ClinicalTrials.gov.
 * @module mcp-server/tools/definitions/get-field-values.tool
 */
import { z } from '@cyanheads/mcp-ts-core';
import { JsonRpcErrorCode } from '@cyanheads/mcp-ts-core/errors';
export declare const getFieldValues: import("@cyanheads/mcp-ts-core").ToolDefinition<z.ZodObject<{
    fields: z.ZodUnion<readonly [z.ZodString, z.ZodArray<z.ZodString>]>;
}, z.core.$strip>, z.ZodObject<{
    fieldStats: z.ZodArray<z.ZodObject<{
        field: z.ZodString;
        piece: z.ZodString;
        type: z.ZodString;
        missingStudiesCount: z.ZodOptional<z.ZodNumber>;
        multiValued: z.ZodOptional<z.ZodBoolean>;
        uniqueValuesCount: z.ZodOptional<z.ZodNumber>;
        topValues: z.ZodOptional<z.ZodArray<z.ZodObject<{
            value: z.ZodString;
            studiesCount: z.ZodNumber;
        }, z.core.$strip>>>;
        trueCount: z.ZodOptional<z.ZodNumber>;
        falseCount: z.ZodOptional<z.ZodNumber>;
    }, z.core.$strip>>;
}, z.core.$strip>, readonly [{
    readonly reason: "field_invalid";
    readonly code: JsonRpcErrorCode.ValidationError;
    readonly when: "A requested field name is not a valid PascalCase piece name.";
    readonly recovery: "Call clinicaltrials_get_field_definitions to browse the field tree; use PascalCase piece names like OverallStatus, Phase, or StudyType.";
}, {
    readonly reason: "rate_limited";
    readonly code: JsonRpcErrorCode.RateLimited;
    readonly when: "ClinicalTrials.gov returned 429 after retry budget exhausted.";
    readonly recovery: "ClinicalTrials.gov rate-limited the request after several retries; wait about a minute before trying again.";
    readonly retryable: true;
}], undefined>;
//# sourceMappingURL=get-field-values.tool.d.ts.map