Folders — Who can do what
• You can only open workspaces you're a member of — a brand-new account belongs to none and sees none until it creates one or is invited.
• Creating a workspace automatically makes you its Admin.
• Inviting members, changing roles, and removing members require the Admin role in that specific workspace — being a member is not enough.
• Transferring ownership requires Admin in that workspace; after the transfer you become an Editor there.
• Only workspace Admins see the + control for adding tables in the sidebar.
• The invite picker only lists people you already share a workspace with — it never exposes the full user directory.