No it wont, it will go into calibre's data base.
However, you can inject it into the library copy of the PDF using the Embed Metadata tool, which you'll probably need to add to a toolbar or menu via Preferences->Toolbars and menus. Metadata can also be embedded in the copy that's created when the Send to a Device and Save to Disk tools are used.
Caveat: I'm not a 100% certain metadata embedding (in Library, or Save, or Send) will work on all PDFs. And most PDF reading apps won't display metadata apart from Title and Author, e.g. Series because its not a Dublin Core element, and nor anything else that's embedded as XMP metadata.
BR
|