There are XML complains after Tag library is created:
Tag library version:

• 1.2 - ERROR
  The content of element type "taglib" is incomplete, it must match "(tlib-version,jsp-version,short-name,uri?,display-name?,small-icon?,large-icon?,description?,validator?,listener*,tag+)".
  ( Simply there is no tag "tag" defined in the default template and when first is created then error is gone )

• 2.0 and 2.1 - WARNING
  No grammar constraints (DTD or XML schema) detected for the document.

Expected state: No error messages / warnings present after using standard creation process.

Steps to reproduce:
Create JSF Project "JSFTest"
In "Web Project" view select "JSFTest" -> "WebContent" -> Create Tag Library
Open Tag Library XML file