import type { MultimodalToolCallResult, ToolCallResult } from '@multimodal/agent-interface';
/**
 * Convert a ToolCallResult to MultimodalToolCallResult
 *
 * This function transforms the original tool call result into a multimodal format
 * that can be processed by LLMs supporting multimodal inputs.
 *
 * Handled cases:
 * - String content: Converted to text type content part
 * - Array content:
 *   - Arrays containing objects with image data: Extracts images and preserves other data
 *   - Arrays of primitive values or objects without images: Stringified and converted to text
 * - Object content with image data: Extracts image data and adds as image_url type
 *   - Supports common image formats (PNG, JPEG, GIF, WEBP)
 *   - Detects image data through explicit type declarations or base64 signatures
 *   - Preserves non-image data from the object as additional text content
 * - Plain objects without image data: Stringified and converted to text type
 * - Null/undefined values: Converted to empty string
 *
 * Not handled cases:
 * - Nested multimodal content beyond one level (images in nested objects beyond first level)
 * - Binary image formats that aren't base64 encoded
 * - SVG or other vector image formats
 * - Video, audio or other non-image media types
 * - Complex hierarchical data structures that might benefit from custom formatting
 *
 * Error handling:
 * - Image processing errors default back to text representation
 * - Any unexpected errors during conversion result in an error message text
 *
 * @param toolCallResult The original tool call result
 * @returns The multimodal version of the tool call result containing text and/or image content parts
 */
export declare function convertToMultimodalToolCallResult(toolCallResult: ToolCallResult): MultimodalToolCallResult;
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