You can write internal comments on each contract card. The users who have access to the contract cards can see the comment along with who wrote it and when the comment was written.
Benefits
You get a central communication point for your contracts.
It will be easier for a user to take over the management of an agreement if the contract card contains valuable comments.
If you are offered the opportunity to comment, you will probably get information that you would otherwise miss out on.
Make qualified decisions with better history.