[GH-ISSUE #18041] issue: web search enabled and fetch MCP break rule 2 tools for the same function #105468

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GiteaMirror · 2026-05-18T03:29:15-05:00

GiteaMirror commented

2026-05-18 03:29:15 -05:00

Originally created by @gattytto on GitHub (Oct 4, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/18041

Check Existing Issues

I have searched for any existing and/or related issues.
I have searched for any existing and/or related discussions.
I am using the latest version of Open WebUI.

Installation Method

Pip Install

Open WebUI Version

v0.6.32 (latest)

Ollama Version (if applicable)

0.12.3

Operating System

nvidia runtime, kubernetes upstream, ubuntu, lxd/baremetal

Browser (if applicable)

chrome

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

search the web using configure search provider ollama cloud search and have fetch MCP available for fetching other raw urls.

Actual Behavior

result:
1: search returns results, fetch
2: MCP gets triggered and fetrhes raw content from result links (I can see result json with raw web contents)
3: ### STUCK ###

Steps to Reproduce

reproduction:

configure ollama cloud search in settings for search tool.

mcpo config:

{
"fetch": {
          "command": "uvx",
          "args": ["mcp-server-fetch"]
        },
}

load some model that allows tools like llama3.2:3b and enable web search tool from open-webui.

ask the model to search the web and sumarize results.

Logs & Screenshots

ollama logs:

2025-10-02T21:57:42.988Z | time=2025-10-02T21:57:42.988Z level=WARN source=harmonyparser.go:482 msg="harmony parser: no reverse mapping found for function name" harmonyFunctionName=search

Additional Information

web->MCP_FETCH->¿web?

should be

web->web_fetch->web || prompts <-> fetch_mcp

As documented, if one tries to register two mcp with the same name or that provide the same tool an error or warning appears but this scenario seems to break that unbreakable rule.

Originally created by @gattytto on GitHub (Oct 4, 2025). Original GitHub issue: https://github.com/open-webui/open-webui/issues/18041 ### Check Existing Issues - [x] I have searched for any existing and/or related issues. - [x] I have searched for any existing and/or related discussions. - [x] I am using the latest version of Open WebUI. ### Installation Method Pip Install ### Open WebUI Version v0.6.32 (latest) ### Ollama Version (if applicable) 0.12.3 ### Operating System nvidia runtime, kubernetes upstream, ubuntu, lxd/baremetal ### Browser (if applicable) chrome ### 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 search the web using configure search provider ollama cloud search and have fetch MCP available for fetching other raw urls. ### Actual Behavior result: 1: search returns results, fetch 2: MCP gets triggered and fetrhes raw content from result links (I can see result json with raw web contents) 3: ### STUCK ### ### Steps to Reproduce reproduction: configure ollama cloud search in settings for search tool. mcpo config: ```json { "fetch": { "command": "uvx", "args": ["mcp-server-fetch"] }, } ``` load some model that allows tools like ```llama3.2:3b``` and enable web search tool from open-webui. ask the model to search the web and sumarize results. ### Logs & Screenshots ollama logs: ```verilog 2025-10-02T21:57:42.988Z | time=2025-10-02T21:57:42.988Z level=WARN source=harmonyparser.go:482 msg="harmony parser: no reverse mapping found for function name" harmonyFunctionName=search ``` ### Additional Information web->MCP_FETCH->¿web? should be web->web_fetch->web || prompts <-> fetch_mcp As documented, if one tries to register two mcp with the same name or that provide the same tool an error or warning appears but this scenario seems to break that unbreakable rule.

GiteaMirror added the bug label 2026-05-18 03:29:15 -05:00

GiteaMirror closed this issue

2026-05-18 03:29:16 -05:00

GiteaMirror commented

2026-05-18 03:29:17 -05:00

@gattytto commented on GitHub (Oct 4, 2025):

screenshots
https://github.com/ollama/ollama/issues/11991#issuecomment-3363379465

@gattytto commented on GitHub (Oct 4, 2025): screenshots https://github.com/ollama/ollama/issues/11991#issuecomment-3363379465

GiteaMirror commented

2026-05-18 03:29:18 -05:00

@tjbck commented on GitHub (Oct 4, 2025):

You should give it an id, it'll be prepended to all tool function names.

@tjbck commented on GitHub (Oct 4, 2025): You should give it an id, it'll be prepended to all tool function names.

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Reference: github-starred/open-webui#105468