MCP Apps: ui/notifications/tool-result missing _meta in ChatGPT
OpenAI Developer Community
March 25, 2026
As a workaround you can read the metadata from the window.openai.toolResponseMetadata when receiving the even ui/notifications/tool-result
But we have seen an issue here : when we receive the notification, the metadata are sometimes not available in window.openai.toolResponseMetadata
This is a bug, has to be filed to support@openai.com
Discussion in the ATmosphere