export interface CappedOutput {
    text: string;
    truncated: boolean;
}
export declare function formatToolResult(data: unknown): {
    content: Array<{
        type: "text";
        text: string;
    }>;
};
export declare function capJsonOutputWithMeta(data: unknown): CappedOutput;
export declare function capJsonOutput(data: unknown): string;
export declare function getOutputCharCount(result: {
    content?: Array<{
        type?: string;
        text?: string;
    }>;
}): number;
export declare function toolError(message: string): {
    content: Array<{
        type: "text";
        text: string;
    }>;
    isError: true;
};