Codex CLI/Desktop:Tool using Error ,missing_required_parameter

Open 💬 0 comments Opened May 31, 2026 by YusenCat

What version of Codex CLI is running?

codex-cli 0.135.0

What subscription do you have?

Pay-as-you-go

Which model were you using?

gpt-5.5

What platform is your computer?

_No response_

What terminal emulator and version are you using (if applicable)?

_No response_

Codex doctor report

What issue are you seeing?

No matter what question I ask,the Codex CLI/Desktop return with error like "{"error":{"message":"Missing required parameter: 'tools[8].tools'. (request id: 20260531014245675302423NCItOxqG) (request id: 202605310142454838655866P1Fv3ji) (request id: 20260531014245452361086WG3d1LSE)","type":"invalid_request_error","param":"tools[8].tools","code":"missing_required_parameter"}} "

What steps can reproduce the bug?

No matter what question I ask ,short or long ,in English or Chinese,as long as I use gpt-5.5(medium,high or other),I will see the error,but when I change my model to gpt-5.4,the Codex returns with normal answer.I can't find any Tips/Tutorials online talk about this question.I think maybe it's some bug only in gpt-5.5,maybe some parameters in gpt-5.5 get wrong,or maybe there's too many requests about gpt-5.5 sended to the server in a short time so it returns wrong information.

What is the expected behavior?

_No response_

Additional information

_No response_

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