translate comments (#12234)

api/core/tools/provider/builtin/aws/tools/bedrock_retrieve.yaml

@@ -73,9 +73,9 @@ parameters:
     llm_description: AWS region where the Bedrock Knowledge Base is located
     form: form
 
-  - name: metadata_filter   # 新增的元数据过滤参数
-    type: string            # 可以是字符串类型，包含 JSON 格式的过滤条件
-    required: false         # 可选参数
+  - name: metadata_filter   # Additional parameter for metadata filtering
+    type: string            # String type, expects JSON-formatted filter conditions
+    required: false         # Optional field - can be omitted
     label:
       en_US: Metadata Filter
       zh_Hans: 元数据过滤器