diff --git a/tracers.ts/src/tracers/array-tracer.ts b/tracers.ts/src/tracers/array-tracer.ts
index 253a532..1437499 100644
--- a/tracers.ts/src/tracers/array-tracer.ts
+++ b/tracers.ts/src/tracers/array-tracer.ts
@@ -9,7 +9,7 @@ interface ArrayTracerCreateOptions<T extends JsonValue[]> {
 export const createArrayTracer = <T extends JsonValue[]>(
   options: ArrayTracerCreateOptions<T>,
 ) => {
-  const { description = 'ArrayTracer', array } = options;
+  const { description, array } = options;
   const tracer = crypto.randomUUID();
 
   // 优化：仅维护数组长度作为影子状态，这在 C++/Java 等强类型语言中也极易实现（仅需一个 int 变量）
@@ -31,8 +31,8 @@ export const createArrayTracer = <T extends JsonValue[]>(
     tracer: tracer,
     action: 'create',
     params: {
-      description: description,
-      array: array,
+      description: description ?? 'ArrayTracer',
+      array: array ?? [],
     },
   });
 
diff --git a/tracers.ts/src/types/array-tracer.ts b/tracers.ts/src/types/array-tracer.ts
index 944a693..81eb06e 100644
--- a/tracers.ts/src/types/array-tracer.ts
+++ b/tracers.ts/src/types/array-tracer.ts
@@ -8,7 +8,7 @@ type ArrayTracerCreateCommand = BaseArrayTracerCommand & {
   action: 'create';
   params: {
     description: string;
-    array?: JsonValue[];
+    array: JsonValue[];
   };
 };