Codex app fails to render Atlassian Jira widget when resources/read is unavailable

Description

After logging out of and back into the Atlassian MCP server, Jira tool calls return valid structured data and complete successfully, but the Codex app displays an MCP app rendering error for the Jira widget.

Error

Failed to load MCP app: resources/read failed for `atlassian` (ui://widget/jira-widget.html): Mcp error: -32601: Method not found

<img width="686" height="205" alt="Image" src="https://github.com/user-attachments/assets/c91dd016-543d-4464-8a1a-a4191bdd650b" />

Steps to reproduce

1. Configure the Atlassian MCP server as https://mcp.atlassian.com/v1/mcp/authv2.
2. Run codex mcp logout atlassian.
3. Run codex mcp login atlassian and complete OAuth successfully.
4. In the Codex desktop app, invoke an Atlassian Jira tool such as issue search, create, or get.
5. Observe the Jira tool succeeds, but Codex surfaces the widget-loading error above.

Expected behavior

Codex should render the advertised Jira widget, or gracefully fall back to the tool's structured/text result when the MCP server does not implement resources/read for the widget URI.

Actual behavior

Codex reports resources/read ... -32601: Method not found, even though the underlying Jira operation succeeds. In the same session, Jira issue creation, search, status transitions, comments, and reads all completed successfully.

Additional context

• This reproduced immediately after a fresh OAuth logout/login, so it does not appear to be caused by the previously stale refresh token.
• Searches of open openai/codex issues for jira-widget, atlassian resources/read, and MCP app Method not found returned no apparent duplicate.
• Feedback/session reference: 019fd48e-8afc-7752-97e0-e4fe767ae2bc

Environment

• Codex desktop app: 26.730.61639 (bundle build 6234)
• Codex CLI: 0.146.0
• macOS: 26.6 (25G70)
• Atlassian MCP auth: OAuth, fresh login