diff --git a/api/core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py b/api/core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py
index ce626bbd7e..fb6eaa370a 100644
--- a/api/core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py
+++ b/api/core/rag/datasource/vdb/analyticdb/analyticdb_vector_openapi.py
@@ -1,5 +1,5 @@
 import json
-from typing import Any
+from typing import Any, TypedDict
 
 from pydantic import BaseModel, model_validator
 
@@ -13,6 +13,13 @@ from core.rag.models.document import Document
 from extensions.ext_redis import redis_client
 
 
+class AnalyticdbClientParamsDict(TypedDict):
+    access_key_id: str
+    access_key_secret: str
+    region_id: str
+    read_timeout: int
+
+
 class AnalyticdbVectorOpenAPIConfig(BaseModel):
     access_key_id: str
     access_key_secret: str
@@ -44,13 +51,14 @@ class AnalyticdbVectorOpenAPIConfig(BaseModel):
             raise ValueError("config ANALYTICDB_NAMESPACE_PASSWORD is required")
         return values
 
-    def to_analyticdb_client_params(self):
-        return {
+    def to_analyticdb_client_params(self) -> AnalyticdbClientParamsDict:
+        result: AnalyticdbClientParamsDict = {
             "access_key_id": self.access_key_id,
             "access_key_secret": self.access_key_secret,
             "region_id": self.region_id,
             "read_timeout": self.read_timeout,
         }
+        return result
 
 
 class AnalyticdbVectorOpenAPI:
diff --git a/api/core/rag/datasource/vdb/chroma/chroma_vector.py b/api/core/rag/datasource/vdb/chroma/chroma_vector.py
index 3e0420b9d0..73787c2f00 100644
--- a/api/core/rag/datasource/vdb/chroma/chroma_vector.py
+++ b/api/core/rag/datasource/vdb/chroma/chroma_vector.py
@@ -1,5 +1,5 @@
 import json
-from typing import Any
+from typing import Any, TypedDict
 
 import chromadb
 from chromadb import QueryResult, Settings
@@ -15,6 +15,15 @@ from extensions.ext_redis import redis_client
 from models.dataset import Dataset
 
 
+class ChromaParamsDict(TypedDict):
+    host: str
+    port: int
+    ssl: bool
+    tenant: str
+    database: str
+    settings: Settings
+
+
 class ChromaConfig(BaseModel):
     host: str
     port: int
@@ -23,14 +32,13 @@ class ChromaConfig(BaseModel):
     auth_provider: str | None = None
     auth_credentials: str | None = None
 
-    def to_chroma_params(self):
+    def to_chroma_params(self) -> ChromaParamsDict:
         settings = Settings(
             # auth
             chroma_client_auth_provider=self.auth_provider,
             chroma_client_auth_credentials=self.auth_credentials,
         )
-
-        return {
+        result: ChromaParamsDict = {
             "host": self.host,
             "port": self.port,
             "ssl": False,
@@ -38,6 +46,7 @@ class ChromaConfig(BaseModel):
             "database": self.database,
             "settings": settings,
         }
+        return result
 
 
 class ChromaVector(BaseVector):