I have tried writing one SCP once and passed it to the drafts forums. Now, that did not go well and I had to scrap the idea as(I suppose) most first SCPs do. However, my feedbacker said mine did not have a story. So my question is, how does a story work? How do I make that narrative work?
An SCP article isn't really about what the SCP is. It's about what the SCP means.
It's about how the world is a different place because the SCP exists. It's about how people interact with it. It's about why the SCP exists. The interplay between the SCP and the people, places, and things around it are what ultimately matter for the success of an article.
For example, consider our old pal SCP-682.
What SCP-682 is: A hostile lizard that's impossible to kill.
What SCP-682 means: There are challenges in this world that are insurmountable, only endurable.
The story of SCP-682 involves all the various ways people have tried to stop it, kill it, defeat it. And yet, it still comes back, and it still hates you. It is in the nature of the beast that we meet our mortality. That's what makes it work.
The story describes this. The narrative is the driving force behind the SCP. It's not enough for your SCP to exist. You have to tell us why it matters.
But… How about SCP-1689? Whats the story there?
It's a man vs. environment conflict primarily with Captain Wells' team contending against a world made of potatoes, which develops into a man vs. organization conflict as the team's order frays. It's also a mystery story that starts with a "bottomless sack" and develop into the reveal that the environment isn't just infinite potatoes, but has walls. With the climactic reveal being that outside the warehouse is a world drowned in potatoes. Themes involve the difference between abundance and an absurd overwhelmining.
Really though it is a pretty straightforward exploration narrative. A team journeys into the unknown, contends with the dangers there, and returns information to the larger world.