To cancel the obligation to fill in the description field, simply delete "required="true"" from the file
/administrator/components/com_spsimpleportfolio/models/forms/item.xml
and line 11 beginning with the words
<field name="description"
For tags, this modification is not enough, because the administration shows an error where the portfolio item does not have a tag.
You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') ORDER BY id ASC' at line 3
this is a major problem because the required item description could be bypassed by inserting a blank space. But if I don't want to use tags, then it will be more complicated...