Logs Don't Show Errors On Tool Failure

What version of Codex is running?

codex-cli 0.21.0

Which model were you using?

gpt-5

What platform is your computer?

Microsoft Windows NT 10.0.26100.0 x64

What steps can reproduce the bug?

Connect the Codex CLI to the QuantConnect MCP Server
Docs:

• https://github.com/openai/codex/blob/main/codex-rs/config.md#mcp_servers
• https://www.quantconnect.com/docs/v2/ai-assistance/mcp-server#03-Getting-Started

What is the expected behavior?

When the CLI reports "tool failed", the logs include an error message.

What do you see instead?

In this simple example, we get "tool failed", but the log files don't report any issues

<img width="1531" height="668" alt="Image" src="https://github.com/user-attachments/assets/dc085a93-6b21-4c59-8421-0838f280b50b" />

codex-tui.log

Additional information

_No response_