When designing (dynamically creating) an Shared Review (by inserting
but forbid any other type of comment?
If yes, how to achieve this?
The permissions on a document don't have the granularity to specify which annotations can or cannot be applied, and scripting inside the PDF cannot disable individual tools.
You could scan through the annotations after they were created (e.g. by hooking into the WillSave event) and pop up an alert if 'illegal' types were used, but that's about it. Comments themselves have no event model.