It all depends on the permissions that your node have, as the root node have all the permissions granted during the chain creation so it can do anything on the chain. So, now if you want to have admin access on some simple node then you can grant admin permission to that simple node. By granting and revoking permissions you can manage the access rights on multichain. So, if you want to check which permissions your node has by default then you can simply use listpermissions [node-address].
