It feels like you're trying to be just vague enough that you won't be called out on being wrong.
The plugin system is completely open. It's a manifest file like a robot.txt. You can hook up the API to those endpoints yourself with minimal technical skill.
Many people had already integrated Wolfram and that was before there was an open format specifically designed to be easily integrated into ChatGPT.
At the end of the day for how overused the term "FUD" is on this site, this is the first time I've actually seen it in action.
One would reasonably consider that the secret should be important to them, given their express concern over safety considerations in particular.