/**
 * Knowledge Graph query tools
 *
 * Provides BFS traversal, entity listing, and path-finding
 * over the entities/triples tables.
 */
/**
 * Traverse the knowledge graph from a starting entity using BFS.
 */
export declare function handleGraphQuery(args: {
    entity: string;
    depth?: number;
    predicates?: string[];
}): {
    content: {
        type: "text";
        text: string;
    }[];
};
/**
 * List entities in the knowledge graph.
 */
export declare function handleGraphEntities(args: {
    type?: string;
    minMentions?: number;
    limit?: number;
}): {
    content: {
        type: "text";
        text: string;
    }[];
};
/**
 * Find paths between two entities via BFS.
 */
export declare function handleGraphExplain(args: {
    from: string;
    to: string;
    maxDepth?: number;
}): {
    content: {
        type: "text";
        text: string;
    }[];
};
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