openclaw - 💡(How to fix) Fix Image tool 'Failed to optimize image' error with all providers [1 comments, 2 participants]

TL;DR

The issue is likely due to a bug in the image preprocessing/optimization step within OpenClaw, and a potential workaround could be to manually encode or optimize the image before passing it to the image tool.

Guidance

• Verify that the image preprocessing/optimization step is the root cause by checking if the error occurs before any provider request is attempted, as mentioned in the Additional Context.
• Check the OpenClaw documentation for any known issues or updates related to image processing, as the version 2026.4.26 may have existing bugs or limitations.
• Consider using a different image processing library or tool to manually optimize the image before passing it to the image tool, to isolate if the issue is specific to OpenClaw's implementation.
• Test the image tool with different image formats and sources to see if the issue is specific to certain types of images.

Example

No code snippet is provided as the issue does not specify any specific code-related details.

Notes

The issue seems to be specific to the image tool and not related to the providers or their APIs, as direct curl requests and PDF analysis via the pdf tool work fine.

Recommendation

Apply workaround: Manually optimize or encode the image before passing it to the image tool, as this may bypass the buggy preprocessing/optimization step within OpenClaw.