The following is some example output pressing tab to reveal the parameters of 'add': -

{{[standalone@localhost:9990 /] ./subsystem=elytron/key-store=localhost:add(
! alias-filter credential-reference path provider-name providers relative-to required type }}

From this is it not clear which are actually required.

Suggestions to make it clearer: -

• Show required / optional in different colours.
• Add something to the required attributes e.g. '*'
• Add something to the optional requirements e.g. {optional_arg}

Maybe this can go one step further and take into account arguments already added by the user, especially where attributes require another attribute or are an alternative.

Once an attribute is identified as being an alternative to another attribute maybe it should be omitted altogether from the list or maybe also have something adding to it !attr_name.