Yes, there is! This is exactly what the end-user document upload feature doesn’t.
If you enable users to upload their own documents into a tool, then a paperclip icon appears on the tool and end-users can upload the documents.
End-user uploaded documents are added to the knowledge base of the tool for only that user’s particular session. Only that end-user in that session will be experiencing a tool with that document in it.
Here is a screenshot of where the toggle is for allowing end-user uploads.