{"record":{"id":"3557be7259f45575","repo":"deepseek-ai/deepseek-harness","slug":"cannot-read-args-file-path-mediatype-imag","errorCode":null,"errorMessage":"cannot read \"${args.file_path}\": ${mediaType} images are not accepted by this deployment","messagePattern":"cannot read \"(.+?)\": (.+?) images are not accepted by this deployment","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/fs/tool-fs/src/read-image.ts","lineNumber":206,"sourceCode":"    },\n    // Content-addressed attachment writes are idempotent, so concurrent reads\n    // of the same file cannot conflict.\n    isConcurrencySafe: () => true,\n    async execute(args, exec) {\n      if (args.file_path.trim().length === 0) throw new Error('file_path must be a non-empty string')\n\n      // Every gate runs before any filesystem I/O so a refusal never leaks\n      // partial reads or attachment writes.\n      const mediaType = imageMediaTypeForPath(args.file_path)\n      if (mediaType === undefined) {\n        throw new Error(`cannot read \"${args.file_path}\": read_image only accepts PNG/JPEG/WebP/GIF paths`)\n      }\n      const attachments = ctx.get('attachments')\n      if (attachments === undefined) {\n        throw new Error(`cannot read \"${args.file_path}\" as an image: no attachment service is mounted`)\n      }\n      if (!attachments.imageLimits.mediaTypes.includes(mediaType)) {\n        throw new Error(`cannot read \"${args.file_path}\": ${mediaType} images are not accepted by this deployment`)\n      }\n      await assertImageCapableRoute(ctx, exec, args.file_path)\n\n      const { target, info } = await resolveRegularReadTarget(ctx, exec, args.file_path)\n\n      // The tool result is one message carrying one image, so the per-message\n      // aggregate bound applies beside the per-image bound.\n      const byteCap = Math.min(attachments.imageLimits.maxImageBytes, attachments.imageLimits.maxMessageImageBytes)\n      const data = await ctx.fs.readBytes(target, exec.signal, byteCap)\n      // Persist before returning: the image block must reference a durably\n      // committed object by the time the tool/result event is appended.\n      let ref: ImageAttachmentRef\n      try {\n        ref = await attachments.saveImage({ data, mediaType, name: basename(target.displayPath) })\n      } catch (error: unknown) {\n        if (!(error instanceof AttachmentError)) throw error\n        // Dimension refusals stay recoverable tool errors: an oversized image\n        // must never enter durable history, where it would ride every later","sourceCodeStart":188,"sourceCodeEnd":224,"githubUrl":"https://github.com/deepseek-ai/deepseek-harness/blob/b150a551b8d465e31e418e1b2eaf5e79bbb7d28e/packages/fs/tool-fs/src/read-image.ts#L188-L224","documentation":"Error \"cannot read \"${args.file_path}\": ${mediaType} images are not accepted by this deployment\" thrown in deepseek-ai/deepseek-harness.","triggerScenarios":"Thrown at packages/fs/tool-fs/src/read-image.ts:206 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"b150a551b8d465e31e418e1b2eaf5e79bbb7d28e","analyzedAt":"2026-08-24T18:12:29.105Z","schemaVersion":2},"datasetVersion":"2026-08-24T22:17:12.610Z"}