Both models discovered the API capabilities and data model from public docs

Both models fetched Notion's developer documentation, including llms.txt, the API reference, and help pages. Both identified the core concepts (pages, databases, blocks, properties), the block types (Opus counted 34; Sonnet counted 33+), the property types (Opus counted 20; Sonnet counted 24), and the data source abstraction. Both noted the API-vs-UI capability gap and the existence of an official MCP server (though neither attempted to use it).