About the display of the root folder of [Box for Salesforce]

I would like to prevent the root folder of [Box for Salesforce] from being shown when I log in to [Box Web].
The reason is that I want to refer to documents attached in [Salesforce] only in the [Salesforce] screen.
When logging in to [Box Web], we would like to tighten the access control of documents by making it impossible to operate the target documents from [Box Web].