/**
 * Validates that a resource URI uses the required ui:// scheme.
 * @throws Error if the URI is invalid.
 */
export declare function validateAppUri(uri: string, context: string): void;
/**
 * Validates the visibility array for an app tool.
 * @throws Error if visibility contains invalid values or is empty.
 */
export declare function validateAppToolVisibility(visibility: Array<string> | undefined, toolName: string): void;
/**
 * Logs a warning if the HTML content exceeds the recommended size.
 */
export declare function warnContentSize(content: string, appName: string): void;
/**
 * Returns true if the tool should be hidden from the LLM agent's tools/list.
 */
export declare function isAppOnlyTool(visibility?: Array<string>): boolean;