how to find out whether a view is updatable

I was looking for a way in which the average psql user could learn
whether a view is updatable.  I was expecting something in \d, \d+, \dv,
\dv+, or a NOTICE from CREATE VIEW.  So far, the only way appears to be
through the information schema or the underlying pg_view_is_updatable
function.  Not even pg_views shows anything.  Is this intentional or an
oversight?