diff --git a/api/configs/app_config.py b/api/configs/app_config.py
index 51e3738580..0ecf05a9b9 100644
--- a/api/configs/app_config.py
+++ b/api/configs/app_config.py
@@ -90,7 +90,10 @@ class DifyConfig(
             "Defaults to api/bin when unset."
         ),
     )
-
+    DIFY_PORT: int = Field(
+        default=5001,
+        description="Port used by Dify to communicate with the host machine.",
+    )
     # Before adding any config,
     # please consider to arrange it in the proper config group of existed or added
     # for better readability and maintainability.
diff --git a/api/core/workflow/nodes/llm/entities.py b/api/core/workflow/nodes/llm/entities.py
index 903f6acd88..e6b25be026 100644
--- a/api/core/workflow/nodes/llm/entities.py
+++ b/api/core/workflow/nodes/llm/entities.py
@@ -77,7 +77,9 @@ class ToolMetadata(BaseModel):
 
     # Core fields
     enabled: bool = True
-    type: ToolProviderType = Field(..., description="Tool provider type: builtin, api, mcp, workflow")
+    type: ToolProviderType = Field(
+        default=ToolProviderType.BUILT_IN, description="Tool provider type: builtin, api, mcp, workflow"
+    )
     provider_name: str = Field(..., description="Tool provider name/identifier")
     tool_name: str = Field(..., description="Tool name")
 
diff --git a/api/core/workflow/nodes/llm/node.py b/api/core/workflow/nodes/llm/node.py
index f96f3eecbc..f64d1c8ab0 100644
--- a/api/core/workflow/nodes/llm/node.py
+++ b/api/core/workflow/nodes/llm/node.py
@@ -420,7 +420,7 @@ class LLMNode(Node[LLMNodeData]):
                 outputs["structured_output"] = structured_output.structured_output
 
             # Send final chunk event to indicate streaming is complete
-            if not self.tool_call_enabled and sandbox is None:
+            if not self.tool_call_enabled:
                 # For tool calls and sandbox, final events are already sent in _process_tool_outputs
                 yield StreamChunkEvent(
                     selector=[self._node_id, "text"],