Agent Builder- When adding a MCP Server tool, UI just spins

[carson]

Screenshot attached. In agent builder when trying to add a MCP Server the UI just spins

[smadzar]

I’m getting the same issue in other places where the MCP server tools dialog is used.
In the DevTools console I see this error:

index-BvhmMsip.js:66 Warning: Missing `Description` or `aria-describedby={undefined}` for {DialogContent}.

Looks like some of the built-in MCP tools (Google Docs, Google Slides) are missing descriptions or something similar.

[ndgold]

Same issue.

When creating a new workflow in Agent Builder → Workflows, adding an MCP task and selecting “Add Server” or “Add Connection” causes the “Add connector” modal to freeze with an indefinite loading spinner. This occurs with a fresh workflow and default MCP task (no custom configuration).

[njenkinsau]

Same issue here. I first observed the issue yesterday afternoon and have been battling through various different pathways assuming it was a problem on my end. Happy to see i’m not the only person facing this issue.
It hangs at the spinner when trying to add an MCP server as an agent tool and also when trying to add an MCP server with the MCP block.
Both pathways log the “Warning: Missing Description or aria-describedby={undefined} for {DialogContent}.” error when the modal opens and hangs

[stephencredmond]

Ditto!

I really, really want to use Agent Builder, but everytime I try something it breaks. It doesn’t feel stable enough to be called Beta!

I wonder has anyone on the thread contacted Support on this?

[grahamplace]

Same issue, appears limited in scope to MCP (from what I’ve seen)

[ndgold]

It is fixed now, at least for me.

[OpenAI_Support]

Hi everyone! We deployed a fix for the issue where adding an MCP task and selecting “Add Server” or “Add Connection” caused the “Add connector” modal to freeze with an indefinite loading spinner. Thanks for the reports + please let us know if you run into any further issues.