/**
 * MCP Tool definitions for PubMed server
 *
 * 9 tools: search, fetch, fetch_batch, get_full_text, count,
 *          find_similar_articles, export_to_ris, get_citation_counts, convert_ids
 */
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { type ExtendedSearchItem, type AbstractItem } from "./pubmed-client.js";
export declare function registerTools(server: McpServer, apiKey?: string): void;
/**
 * Cap very long author lists to keep returned JSON compact.
 *
 * Consortium / multi-site trials can list dozens to hundreds of authors. When
 * the list exceeds `max`, keep the first `keep` names and append "et al." so the
 * model still gets the lead authors without flooding its context. Lists at or
 * below `max` are returned unchanged.
 */
export declare function capAuthors(authors: string[], max?: number, keep?: number): string[];
export declare function shapeSearchResult(item: ExtendedSearchItem, mode: "minimal" | "compact" | "full", abs?: AbstractItem): Record<string, unknown>;
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