Been having a discussion about what constitutes a shepherd moon over on EDCD.
It has to be close enough to the rings to actually sheperd it, So I have been modifying the Canonn plugin to use the same criteria as Elite Observatory which is 10 radii.
I tested it on
Traikaae YL-D d12-66 9 a and it doesn't qualify because ar an orbit of 577,275 km it is about 20 radii from the nearest ring. Also the C ring is likely to be invisible so likely to be a long way from the nearest visible ring.
That said, this thread is about inner moons so I can get the plugin to display "Inner Moon" even if it doesn't qualify as a sheperd.