import type { MediaRef } from '../../media/types.js';
export type ToolMediaType = 'photo' | 'video' | 'audio' | 'document';
export declare function detectToolMediaMimeType(buffer: Buffer, filePath: string): string;
export declare function mediaTypeFromMimeType(mimeType: string): ToolMediaType;
export declare function persistToolMedia(params: {
    buffer: Buffer;
    filePath: string;
    mediaType?: ToolMediaType;
}): Promise<MediaRef>;