[GH-ISSUE #14716] When the LLM calls the mcpo tool, the returned content is empty. #32873

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GiteaMirror · 2026-04-25T06:43:55-05:00

GiteaMirror commented

2026-04-25 06:43:55 -05:00

Originally created by @Soein on GitHub (Jun 6, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/14716

Check Existing Issues

I have searched the existing issues and discussions.
I am using the latest version of Open WebUI.

Installation Method

Docker

Open WebUI Version

main

Ollama Version (if applicable)

No response

Operating System

Ubuntu

Browser (if applicable)

No response

Confirmation

I have read and followed all instructions in README.md.
I am using the latest version of both Open WebUI and Ollama.
I have included the browser console logs.
I have included the Docker container logs.
I have provided every relevant configuration, setting, and environment variable used in my setup.
I have clearly listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc).
I have documented step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation. My steps:
Start with the initial platform/version/OS and dependencies used,
Specify exact install/launch/configure commands,
List URLs visited, user input (incl. example values/emails/passwords if needed),
Describe all options and toggles enabled or changed,
Include any files or environmental changes,
Identify the expected and actual result at each stage,
Ensure any reasonably skilled user can follow and hit the same issue.

Expected Behavior

Every time a new conversation is started and a request is sent to call the mcpo tool, it only succeeds 1–2 times out of 10. In the other cases, the tool returns empty content, so the model cannot retrieve the returned data to generate a response.

Actual Behavior

Every time a new conversation is started and a request is sent to call the mcpo tool, it only succeeds 1–2 times out of 10. In the other cases, the tool returns empty content, so the model cannot retrieve the returned data to generate a response.

Steps to Reproduce

Every time a new conversation is started and a request is sent to call the mcpo tool, it only succeeds 1–2 times out of 10. In the other cases, the tool returns empty content, so the model cannot retrieve the returned data to generate a response.

Logs & Screenshots

Additional Information

Ollama is running on the local machine, Open WebUI is running in Docker on the same machine, and both the mcpo tool and the proxy MCP are also on the local machine.

Originally created by @Soein on GitHub (Jun 6, 2025). Original GitHub issue: https://github.com/open-webui/open-webui/issues/14716 ### Check Existing Issues - [x] I have searched the existing issues and discussions. - [x] I am using the latest version of Open WebUI. ### Installation Method Docker ### Open WebUI Version main ### Ollama Version (if applicable) _No response_ ### Operating System Ubuntu ### Browser (if applicable) _No response_ ### Confirmation - [x] I have read and followed all instructions in `README.md`. - [x] I am using the latest version of **both** Open WebUI and Ollama. - [x] I have included the browser console logs. - [x] I have included the Docker container logs. - [x] I have **provided every relevant configuration, setting, and environment variable used in my setup.** - [x] I have clearly **listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup** (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc). - [x] I have documented **step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation**. My steps: - Start with the initial platform/version/OS and dependencies used, - Specify exact install/launch/configure commands, - List URLs visited, user input (incl. example values/emails/passwords if needed), - Describe all options and toggles enabled or changed, - Include any files or environmental changes, - Identify the expected and actual result at each stage, - Ensure any reasonably skilled user can follow and hit the same issue. ### Expected Behavior Every time a new conversation is started and a request is sent to call the mcpo tool, it only succeeds 1–2 times out of 10. In the other cases, the tool returns empty content, so the model cannot retrieve the returned data to generate a response. ### Actual Behavior Every time a new conversation is started and a request is sent to call the mcpo tool, it only succeeds 1–2 times out of 10. In the other cases, the tool returns empty content, so the model cannot retrieve the returned data to generate a response. ### Steps to Reproduce Every time a new conversation is started and a request is sent to call the mcpo tool, it only succeeds 1–2 times out of 10. In the other cases, the tool returns empty content, so the model cannot retrieve the returned data to generate a response. ### Logs & Screenshots <img width="1054" alt="Image" src="https://github.com/user-attachments/assets/b562f78e-ec96-43c8-85b2-e3a6ef529086" /> ### Additional Information Ollama is running on the local machine, Open WebUI is running in Docker on the same machine, and both the mcpo tool and the proxy MCP are also on the local machine.

GiteaMirror added the bug label 2026-04-25 06:43:55 -05:00

GiteaMirror closed this issue

2026-04-25 06:43:57 -05:00

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Reference: github-starred/open-webui#32873