Description:
We can choose to document that mongocryptd will detect when executing a command would require a collation-aware comparison to a string field. However, mongocryptd can only detect an error in this situation when the collation is passed explicitly with the query. Collection-default collations are unknown to mongocryptd, and cannot be supported in the same way. For details, see the query support document for FLE: https://docs.google.com/document/d/1r8jB7qr25UPW76-EFyR7DQsZ2ApPcRxGTRrFpBErsa4/edit#heading=h.ke91xe1nponr
Engineering Ticket Description:
If a field in the command is found to be encrypted with an underlying type string, then return an error.