import type { Schema } from '../types/schema.js';
/**
 * Check if a collection exists in the context schema.
 * @param collection - The collection to check.
 * @param contextSchema - The context schema.
 * @returns The collection if it exists, otherwise an error.
 */
export declare function checkCollection(collection: string, contextSchema: Schema): Record<string, import("../types/schema.js").Field> | {
    isError: boolean;
    content: {
        type: "text";
        text: string;
    }[];
} | undefined;