Potentially documentation hole in describe_* macros

[xd009642]

So in counter!() from the examples I can do counter!("total_calls", "protocol" => "http"); But then how would I then use describe_counter! to describe this newly created counter? Maybe this is exporter specific but it feels like there's some documentation gap with how to refer to the same metric across different macro invocations.

Willing to help out with docs once I grok how it all works 🙏