CLI commands does not show important information about option and arguments to be helpful

e.g. "schema -h"
~~~
Manipulates protobuf schemas

Options:
-u, --upload
-h, --help

Arguments:
~~~

There is no hint what jind of argument is needed and what the options are for.

The help should show the expected/possible arguments and valid values for the options, as well the defaults might be good to know