• I have searched the issues of this repo and believe that this is not a duplicate.

Issue

The existing doc mentions readme=... for the pyproject.toml, but it doesn't tell the user that it maps to the long_description of setup.py, i.e. the Description metadata for the package.

NOTE: there was another GitHub issue about long_description, but it was closed without the documentation being updated, so I'm creating a separate ticket for this doc update work.