/**
 * Call a tool on a connected server.
 * Resolves the server by ID or name, auto-connecting built-in servers.
 */
export declare function callServerTool(serverId: string, toolName: string, args: Record<string, any>, authContext?: {
    userId?: string;
    delegationToken?: string;
}): Promise<any>;
/**
 * Return a map of tool functions suitable for proxyActivities().
 *
 * Each tool is wrapped as:
 *   `mcp_{serverName}_{toolName}(args) => Promise<any>`
 *
 * Usage in a workflow:
 * ```typescript
 * const tools = await mcpClient.toolActivities(serverId);
 * const proxied = Durable.workflow.proxyActivities({ activities: tools });
 * const result = await proxied.mcp_myserver_search({ query: 'hello' });
 * ```
 */
export declare function toolActivities(serverId: string): Promise<Record<string, (args: Record<string, any>) => Promise<any>>>;