feat(cli): Add --allowed-tools flag to bypass tool confirmation (#2417) (#6453)

packages/core/src/tools/tools.ts

@@ -307,6 +307,21 @@ export abstract class BaseDeclarativeTool<
  */
 export type AnyDeclarativeTool = DeclarativeTool<object, ToolResult>;
 
+/**
+ * Type guard to check if an object is a Tool.
+ * @param obj The object to check.
+ * @returns True if the object is a Tool, false otherwise.
+ */
+export function isTool(obj: unknown): obj is AnyDeclarativeTool {
+  return (
+    typeof obj === 'object' &&
+    obj !== null &&
+    'name' in obj &&
+    'build' in obj &&
+    typeof (obj as AnyDeclarativeTool).build === 'function'
+  );
+}
+
 export interface ToolResult {
   /**
    * Content meant to be included in LLM history.