The Panopticon/She Said, He Said: A Prequel- why is this invalid?

Just a quick question on why She Said, He Said: A Prequel (aka the prequel to The Name of the Doctor) is listed as invalid on its own page. I'm assuming it's because the story isn't classed as a story due to it being more of a few character monologue from the Doctor and Clara, therefore failing rule 1. Would this be a correct assumption?