import { ApolloLink } from "@apollo/client";
/**
 * A terminating link that sends a GraphQL request through an agent tool call.
 * When providing a custom link chain to `ApolloClient`, `ApolloClient` will
 * validate that the terminating link is an instance of this link.
 *
 * @example Providing a custom link chain
 *
 * ```ts
 * import { ApolloLink } from "@apollo/client";
 * import { ApolloClient, ToolCallLink } from "@apollo/client-ai-apps";
 *
 * const link = ApolloLink.from([
 *   ...otherLinks,
 *   new ToolCallLink()
 * ]);
 *
 * const client = new ApolloClient({
 *   link,
 *   // ...
 * });
 * ```
 */
export declare class ToolCallLink extends ApolloLink {
    readonly name = "ToolCallLink";
    request(operation: ApolloLink.Operation): import("rxjs").Observable<{
        errors?: ReadonlyArray<import("graphql").GraphQLFormattedError>;
        data?: import("graphql/jsutils/ObjMap").ObjMap<unknown> | null;
        extensions?: import("graphql/jsutils/ObjMap").ObjMap<unknown>;
    }>;
}
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