"Swiss Army Knife for PDF files" -> "jPDF Tweak is a Java Swing application that can combine, split, rotate, reorder, watermark, encrypt, sign, and otherwise tweak PDF files." Reproducible: Always
The DESCRIPTION is fine - it's what the HOMEPAGE says right at the top. What you want looks like a candidate for the metadata.xml tag <longdescription>, though, and that allows you to add most of the stuff under the =Introduction= header.
+ 08 Jan 2014; Tom Wijsman <TomWij@gentoo.org> +jpdftweak-0.9-r1.ebuild, + -jpdftweak-0.9.ebuild, metadata.xml: + Add longdescription; fixes bug #496298, reported by Jonas Stein. Revision + bump, EAPI 5. Thank you for reporting.