github / github/app

Non-whitelisted MCP's keep connecting instead of showing error

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Description

### Short summary

Non-whitelisted MCP's keep connecting (showing spinner) instead of showing error

### Affected version or release

v1.0.23

### Installation context

_No response_

### What happened?

On an ghe.com with 'Restrict MCP access to registry servers' set to registry only when trying to use an non-whitelisted MCP server it keeps spinning/connecting instead of showing an error

### Steps to reproduce

1. Have 'Restrict MCP access to registry servers' set to registry only
2. Add non-whitelisted MCP server
3. MCP server keeps connecting/spinning

### Expected behavior

1. Have 'Restrict MCP access to registry servers' set to registry only
2. Add non-whitelisted MCP server
3. MCP server shows error / whitelisting error

### Additional context

_No response_

Contributor guide

Open the contributing guide

Research direction

Start by reproducing the issue on ghe.com with “Restrict MCP access to registry servers” set to registry only, then add a non-whitelisted MCP server and observe the connection state. Trace the code responsible for MCP connection failures and verify that the server stops spinning and displays a whitelisting error.

Written by the indexing model from the issue text.

Assessment

Tech stack
github
Domain
desktop
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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