I found the Import method:
sdcli unittest -imp -repo <connection name> -file <filename> [ -overwrite | -skip ]
Sadly, the <description>text</description> is overwritten with the <code>code</code> upon import.
I tried editing the <description> value the XML Document that is stored in UT_LIB_VALIDATIONS by hand. That didn't work
However, editing the <code> value did change what was shown.
Is displaying the <code> what should be shown or should it show <description>?
Sounds like a "feature request".
Now - to test - which one ( <code> or <description>) is actually ran for the Unit Testing?