/**
 * Action object embedded in `structuredContent` so MCP clients that support
 * rich rendering (Claude Code, future Claude.ai, Cursor) can show a real
 * button. Clients that don't render `structuredContent` still see the URL
 * in the text fallback.
 */
export interface ToolAction {
    type: 'open_url';
    label: string;
    url: string;
}
interface RenderedError {
    content: Array<{
        type: 'text';
        text: string;
    }>;
    structuredContent?: {
        actions: ToolAction[];
    };
    isError: true;
}
/**
 * Render an SDK error as an MCP tool execution result.
 *
 * Credit exhaustion gets a human-readable message AND a structured `actions`
 * payload (per MCP spec 2025-11-25) so clients can render a button. Clients
 * without structured-content support still see the URL in the text fallback.
 *
 * All other errors fall through to the existing `Error: <message>` format.
 */
export declare function renderToolError(err: unknown): RenderedError;
export {};
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