This Nuspec reference explains the description and summary text fields: https://docs.nuget.org/create/nuspec-reference
In regards to the summary it says it is
A short description of the package. If specified, this shows up in the middle pane of the Add Package Dialog. If not specified, a truncated version of the description is used instead.
Does anyone know the max length of the summary, description, and how many characters from the description will be used if the summary is not provided?