In the setting "no proxy sites" wrong field

The Web proxy settings on the tab “sites without proxy” host and no field is present unnecessary destination

Or is it a bug in help?

The “Host” field is referring to the field inside the “Hosts without proxy” page, but I agree with you is not much clear.

I would you improve the inline help?

I do not quite understand what you are proposing to do

How would you improve the inline help in order to make it more understandable?