Rate limiting gatekeeper for Notion API calls. MUST be executed BEFORE every curl, bash, or tool execution that calls the Notion API (api.notion.com). Enforces Notion's rate limit of 3 requests/second average to prevent HTTP 429 errors. Triggers when making any request to api.notion.com, using Notion MCP server, or any operation involving Notion pages, databases, blocks, or comments via API.