Fix/17466 cannot create a knowledge base by adding files (#17470)

api/core/tools/utils/dataset_retriever/dataset_retriever_tool.py

@@ -6,7 +6,6 @@ from core.rag.datasource.retrieval_service import RetrievalService
 from core.rag.entities.context_entities import DocumentContext
 from core.rag.models.document import Document as RetrievalDocument
 from core.rag.retrieval.retrieval_methods import RetrievalMethod
-from core.tools.entities.common_entities import I18nObject
 from core.tools.utils.dataset_retriever.dataset_retriever_base_tool import DatasetRetrieverBaseTool
 from extensions.ext_database import db
 from models.dataset import Dataset
@@ -39,10 +38,7 @@ class DatasetRetrieverTool(DatasetRetrieverBaseTool):
     def from_dataset(cls, dataset: Dataset, **kwargs):
         description = dataset.description
         if not description:
-            description = I18nObject(
-                en_US="useful for when you want to answer queries about the " + dataset.name,
-                zh_Hans="用于回答关于 " + dataset.name + " 的查询",
-            )
+            description = "useful for when you want to answer queries about the " + dataset.name
 
         description = description.replace("\n", "").replace("\r", "")
         return cls(