initial cli api, some movement on tool selection

types.ts

@@ -1,3 +1,9 @@
 declare global {
-    type Tool<T extends unknown[]> = (...args: T) => Promise<void>
-}
+  type ToolFunc<T extends unknown[]> = (...args: T) => Promise<void>;
+  interface ITool {
+    name: string;
+    description: string;
+    run: ToolFunc<any[]>;
+    help?: () => Promise<void> | void;
+  }
+}