A reader named Valentin asked me a good question in the comments of an earlier post. I had published a table showing that MCP registry listings fail at wildly different rates depending on where they're hosted — Railway 66%, Vercel 8% — and argued you could use that as a prior to order a revalidation queue instead of re-probing all 10,716 entries evenly. His question: do the entries carry submission dates? Because if failure rate also climbs with listing age inside a single platform , that's ...