Function transformResultContent

src/services/mcp/client.ts:2480–2593

(
  resultContent: PromptMessage['content'],
  serverName: string,
)

 * Transform result content from an MCP tool or MCP prompt into message blocks
 */
export async function transformResultContent(
  resultContent: PromptMessage['content'],
  serverName: string,
): Promise<Array<ContentBlockParam>> {
  switch (resultContent.type) {
    case 'text':
      return [
        {
          type: 'text',
          text: resultContent.text,
        },
      ]
    case 'audio': {
      const audioData = resultContent as {
        type: 'audio'
        data: string
        mimeType?: string
      }
      return await persistBlobToTextBlock(
        Buffer.from(audioData.data, 'base64'),
        audioData.mimeType,
        serverName,
        `[Audio from ${serverName}] `,
      )
    }
    case 'image': {
      // Resize and compress image data, enforcing API dimension limits
      const imageBuffer = Buffer.from(String(resultContent.data), 'base64')
      const ext = resultContent.mimeType?.split('/')[1] || 'png'
      const resized = await maybeResizeAndDownsampleImageBuffer(
        imageBuffer,
        imageBuffer.length,
        ext,
      )
      return [
        {
          type: 'image',
          source: {
            data: resized.buffer.toString('base64'),
            media_type:
              `image/${resized.mediaType}` as Base64ImageSource['media_type'],
            type: 'base64',
          },
        },
      ]
    }
    case 'resource': {
      const resource = resultContent.resource
      const prefix = `[Resource from ${serverName} at ${resource.uri}] `

      if ('text' in resource) {
        return [
          {
            type: 'text',
            text: `${prefix}${resource.text}`,
          },
        ]
      } else if ('blob' in resource) {