/**
 * @fileoverview PubMed spell-check tool. Uses NCBI's ESpell service
 * to suggest corrections for search queries.
 * @module src/mcp-server/tools/definitions/spell-check.tool
 */
import { z } from '@cyanheads/mcp-ts-core';
export declare const spellCheckTool: import("@cyanheads/mcp-ts-core").ToolDefinition<z.ZodObject<{
    query: z.ZodString;
}, z.core.$strip>, z.ZodObject<{
    original: z.ZodString;
    corrected: z.ZodString;
    hasSuggestion: z.ZodBoolean;
}, z.core.$strip>, readonly [{
    readonly reason: "queue_full";
    readonly code: import("@cyanheads/mcp-ts-core/errors").JsonRpcErrorCode.RateLimited;
    readonly when: "Local NCBI request queue is at capacity.";
    readonly recovery: "Retry after 1-2 seconds; the request queue hit the NCBI rate limit.";
    readonly retryable: true;
}, {
    readonly reason: "ncbi_unreachable";
    readonly code: import("@cyanheads/mcp-ts-core/errors").JsonRpcErrorCode.ServiceUnavailable;
    readonly when: "NCBI E-utilities is unreachable after all retry attempts.";
    readonly recovery: "Retry after a brief delay; NCBI was unreachable across all retry attempts.";
    readonly retryable: true;
}, {
    readonly reason: "ncbi_deadline_exceeded";
    readonly code: import("@cyanheads/mcp-ts-core/errors").JsonRpcErrorCode.Timeout;
    readonly when: "Total request deadline expired before NCBI returned a response.";
    readonly recovery: "Reduce batch size or retry; NCBI may be under temporary load.";
    readonly retryable: true;
}, {
    readonly reason: "ncbi_invalid_response";
    readonly code: import("@cyanheads/mcp-ts-core/errors").JsonRpcErrorCode.SerializationError;
    readonly when: "NCBI returned a body that could not be parsed (invalid XML/JSON).";
    readonly recovery: "Retry the request; NCBI returned a malformed response that could not be parsed.";
    readonly retryable: true;
}, {
    readonly reason: "ncbi_resource_not_found";
    readonly code: import("@cyanheads/mcp-ts-core/errors").JsonRpcErrorCode.NotFound;
    readonly when: "NCBI returned a structured \"not found\" error for the requested ID(s).";
    readonly recovery: "Verify the ID exists in PubMed; the resource was not found in NCBI and retrying will not help.";
    readonly retryable: false;
}]>;
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