There are several policies documented in :ref:`GitHub Issue Management <issues>` that the on-call platform reviewer should enforce. The on-call reviewer should run through this checklist at least once per day.
Search for issues without an assigned team and assign a team. When in doubt, seek advice on slack.
Search for issues without an assigned individual
and assign an owner. When in doubt, assign :ref:`the lead <issues-team>`
associated with the issue's team label.
Search for pull requests that need review and (probably) assign a feature reviewer. This is intended to make sure that requests from outside developers receive timely attention. For a pull request by a core Drake Developer, leaving it unassigned may be acceptable when it is clearly an early work-in-progress -- but if it is unassigned for several days, you should probably encourage the developer to label it "do not review" for clarity.