As part of CSHARP-3057, we added a `ServerDescription` to `Server.cs`. The `SetDescription` method was initially modeled after the one we use in `ServerMonitor` but due to concerns about race conditions, we ended using a different pattern.

I've included a screenshot of the linked explanation due to the tendency of that PR to display a Unicorn error. Given the default heartbeat interval, this race condition isn't likely to occur IMHO, but updating the code to use the pattern we now use in `Server.SetDescription` would prevent it altogether.