The article has no date on it, but says deferred tool loading is a recent update that occurred after the article was written. Deferred tool loading was added in Nov 2025: https://www.anthropic.com/engineering/advanced-tool-use

So these numbers are at least 7 months out of date. Why is this being posted now?

Deferred tool loading is not part of MCP. It's a Claude API special parameter that most other LLM APIs do not support.