What does it mean that NodeTool is agent-first?

It means the AI agent works in the same editors you do. The node canvas, sketch pad, storyboard, video timeline, script editor, 3D scene, game editor, and app builder each give the agent the actions you have, so it can change your project the way you would. A log records every action the agent took, its result, and any error. Coding agents outside NodeTool, such as Claude Code, can use the same actions through MCP, the standard way AI agents connect to outside tools.