ve-ui-mwParameterPage-actions have tabindex=-1, which makes them unreachable by keyboard, the same for the "Add parameter" button.
The text area of the fields is missing the 'required' attribute for fields that are required.
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=65473
https://bugzilla.wikimedia.org/show_bug.cgi?id=62337