Update twine/commands/check.py

Co-authored-by: Ian Stapleton Cordasco <graffatcolmingov@gmail.com>

twine/commands/check.py

@@ -176,11 +176,14 @@ def main(args: List[str]) -> bool:
     :return:
         The exit status of the ``check`` command.
     """
-    description = """
-    This currently only validates ``long_description``, but more checks could be
-    added.
-
-    Note: check is not intended to catch all reasons why an upload to PyPI might fail.
+    description = """This currently only validates if long_description will render on PyPI.
+    
+    ** Caution: This does **not** verify everything that PyPI will.
+
+    ** Caution: This **never** verifies anything pertinent to non-PyPI index behaviour.
+    
+    By virtue of performing rendering checks on the long_description, this may validate
+    other metadata characteristics loosely. 
     """
     parser = argparse.ArgumentParser(prog="twine check", description=description)
     parser.add_argument(