The client gets an exception similar to:
Your command exceeds the max request size which is 1Mb for Free and Standard databases.
You can split your data into smaller chunks and send them in seperate commands.
You can upgrade your database to Premium as it has higher limits. Or you can contact firstname.lastname@example.org about the options with higher max request size limit.
max-request-size-limit is about the size of a single request. Your datastructure (like list, set) can exceed the max request size limit without any problem. If you try to load all elements in the list with a single request then it can throw the max-request-size-limit exception.