In some cases Canvas will send an unveriifed email address in LTI launches. In particular there is an opportunity for end users to add any email address to their account and then have that address sent in an LTI launch. Some LTI tools will then use then use this address to match with accounts on their system. This request is to close that loophole in Canvas and not send an unverified email address in the LTI launch. The UI shows it as unverified so LTI should not send it.
The address is being sent in the "lis_person_contact_email_primary" field. This request is to change that field to show as blank/empty when the address is not verified.