// guides · 08
Builtin tools by surface
Tools are the agent's action surface. Each tool has category, tier and sensitivity; the harness records call, approval, result, effect and events.
| level | examples | handling |
|---|---|---|
| safe | read_file, list_dir, recall_memory, process_log | runs directly |
| sensitive | write_file, edit_file, remember_user, spawn, browser click/fill | go/no-go according to approval mode |
| dangerous | run_shell, process_start | always approval outside yolo |