Hello. Thank you for contacting the Toolset support.
Can you be more specific what exactly and for what role you want to grant access using the Toolset access plugin? Maybe you can share screenshot as I would like to know what tab (Toolset plugin tab) you mentioned you are talking about.
Toolset Access works based on the role but you can add specific user permission by adding user to specific capability of the post type, please check the following screenshot:
=> hidden link
If you want to remove the menu item from Toolset admin menu based on role you will have to add hook that will remove the unwanted menu item.