When does ESD collect my personal information?
Never. Any personal information collected (which should be none) is purely done by internal Google processes. I have not coded any personal data collection into ESD. Your data is YOUR data.
Where does ESD send my personal information?
Nowhere. Any personal information sent anywhere (which should be nowhere) is purely done by internal Google processes. I have not coded any personal data sharing into ESD. Your data is no one else's business.
Will ESD ever do anything with my personal information?
Probably not. The only information gathering likely to ever be done by ESD would be analytics to see how many users ESD has and how often it is used. This is not something it currently does, and if it ever is done it would purely be so I could look at pretty graphs when I get bored.
Google requires it for verification. I would prefer new users not have to take extra steps to install ESD nor do I want users to feel uneasy because they are installing an "unverified add-on."