As a Roblox plugin developer, it is currently impossible to access this little popup that shows when entering parameters:
If Roblox is able to address this issue, it would make the ability to fill in for spots where using a game framework changes how types are solved.
I have been working on a custom intellisense system for my game framework, and it will always be just a little bit worse than working without the game framework because we don’t have access to this tooltip.