/**
 * MCP plan-history tools (v3.1)
 *
 * 3 tools:
 *  - explain_query_with_advice: EXPLAIN + IndexAdvisor
 *  - compare_query_plans: PlanDiff between two snapshots
 *  - list_query_plans: recent PlanHistory entries
 */
import type { QueryAnalyzer } from '../../core/query-analyzer.js';
import type { PlanHistory } from '../../core/plan-history.js';
export declare function buildExplainQueryWithAdviceHandler(qa: QueryAnalyzer, planHistory: PlanHistory): (args: {
    sql: string;
    profileName?: string;
    persist?: boolean;
}) => Promise<{
    explain: import("../../core/query-analyzer-types.js").ExplainResult;
    advice: import("../../core/index-advisor.js").IndexAdvice[];
    captured: boolean;
}>;
export declare function buildCompareQueryPlansHandler(planHistory: PlanHistory): (args: {
    queryHash: string;
    entryA?: number;
    entryB?: number;
}) => Promise<{
    error: string;
    count: number;
    from?: undefined;
    to?: undefined;
    diff?: undefined;
} | {
    from: {
        id: number | undefined;
        capturedAt: string;
        sqlOriginal: string;
    };
    to: {
        id: number | undefined;
        capturedAt: string;
        sqlOriginal: string;
    };
    diff: import("../../core/plan-diff.js").PlanDiffResult;
    error?: undefined;
    count?: undefined;
}>;
export declare function buildListQueryPlansHandler(planHistory: PlanHistory): (args: {
    limit?: number;
    queryHash?: string;
}) => Promise<{
    plans: {
        id: number | undefined;
        queryHash: string;
        capturedAt: string;
        sqlOriginal: string;
        dbType: string;
        profileName: string | null;
    }[];
}>;
export declare const PLAN_HISTORY_TOOL_DESCRIPTIONS: {
    explain_query_with_advice: string;
    compare_query_plans: string;
    list_query_plans: string;
};
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