Incorrect tool call generation

[wbyche]

Hi! I am trying to use Codex CLI on Ubuntu.

To verify the basic functionality, I asked “please check how many files are under the current folder,” but the built‑in Shell Command tool did not run.

I examined the trace that was sent to the LLM for more detail, and the Codex CLI correctly generated the command to invoke the built‑in Shell tool. However, the JSON format is malformed, so the command is not actually executed.

Could you help me determine whether this is a bug in the tool or an issue with my environment?

I am using Codex CLI 0.40.0 on Ubuntu 22.04

[Log generated in local machine]