Hi people, I’m seeing an inconsistency between documented behavior and runtime behavior in ChatGPT Dev for MCP Apps. According to docs, tool results should include structuredContent + _meta, where _meta is widget-only data (not added to model context). Docs references: developers.openai. com/a…

[image] MCP Apps in ChatGPT are fundamentally broken - 2 critical bugs ChatGPT Apps SDK Hey all, sorry this took so long–to be frank, it took me a bit of time personally to understand why this was an issue (I spend more time on the top-level MCP spec rather tha…

Same here. Raised it almost a month ago, no response. [image] Bug Report: ChatGPT strips _meta from tool results and breaks MCP Apps viewUUID state persistence pattern ChatGPT Apps SDK We migrated our ChatGPT App from the OpenAI Apps SDK to the MCP Apps stand…

Thanks @nico9 At the moment this seems to work for the UI widget as a workaround: app.ontoolresult = params => { loadPayload({ // Patch to get metadata from ChatGPT _meta: { ...window.openai?.toolResponseMetadata }, ...params }); };

We experienced the same issue. Our app rejected because the structured content included an ID, but since _meta always returns empty, we are forced to send the required data within the structured content. We sent an explanatory email, and they informed us that it will be reviewed again within this co…

Thanks for the detailed report. We’re tracking the reports around MCP Apps tool result metadata, including cases where custom `_meta` from `CallToolResult` is not appearing in `ui/notifications/tool-result`. Because deeper troubleshooting may require app-specific or account-specific details, please …

Thanks for the update Casey :folded_hands:

ChatGPT MCP Apps bridge drops custom _meta from tool results in ui/notifications/tool-result

ChatGPT Apps SDK

nico9 March 30, 2026, 12:02pm 2

Same here.

Raised it almost a month ago, no response.

Topic		Replies	Views
MCP Apps in ChatGPT are fundamentally broken - 2 critical bugs ChatGPT Apps SDK bug , mcp , apps-sdk	22	1571	May 28, 2026
MCP Apps: ui/notifications/tool-result missing _meta in ChatGPT ChatGPT Apps SDK	4	301	May 30, 2026
Bug Report: ChatGPT strips _meta from tool results and breaks MCP Apps viewUUID state persistence pattern ChatGPT Apps SDK chatgpt , bug , apps-sdk , chatgpt-apps	2	243	May 1, 2026
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[BUG] ChatGPT mobile app fails to render MCP App widget when the widget-linked tool is called after another tool in the same assistant turn (regression, ~July 10) ChatGPT Apps SDK bug , apps-sdk , chatgpt-apps	6	424	August 11, 2026

ChatGPT MCP Apps bridge drops custom _meta from tool results in ui/notifications/tool-result

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