Message 'ScopedBookmarkAgent wants to use "Local Items" keychain.' appears every time I restart my laptop. How to turn it off? 
How to solve the issue
- In the Finder click on the Go menu and select the 'Go to folder'
option (⇧⌘G) - In the dialogue box type ~/Library/Keychains/ and click Enter

- Look for a folder with a name like this
'0687DED4-EAE1-57DA-B27F-364FB153C9E5' and delete it (⇧⌘⌫) - Restart your Mac