You want to verify if your management server is ready to upgrade to R81.

According to the Check Point website, you can use the pre_upgrade_verifier tool to verify if your management server is ready to upgrade to R81.20. This tool checks the compatibility of your current configuration and database with the target version, and provides a detailed report of any issues or warnings. The other tools are either used for exporting or importing databases, or not valid tools. References: Upgrade Verification Service