Disable "Create Custom Tool"

Hello together,

I realise it is possible to disable tools with the registry key [HKLM\SOFTWARE\Policies\Adobe\<product name>\<version>\FeatureLockDown\AcroApp\cDisabled]

However, I wasn't able to deactivate the "Create Custom Tool".

See also the screenshots.

Does somebody know how it is possible?

Kind regards,

NamelessOne1983