diff --git a/lang_agent/graphs/tool_nodes.py b/lang_agent/graphs/tool_nodes.py
index 1daab72..aed0852 100644
--- a/lang_agent/graphs/tool_nodes.py
+++ b/lang_agent/graphs/tool_nodes.py
@@ -6,11 +6,10 @@ import os.path as osp
 
 from lang_agent.config import InstantiateConfig, KeyConfig
 from lang_agent.tool_manager import ToolManager
-from lang_agent.base import GraphBase
+from lang_agent.base import ToolNodeBase
 from lang_agent.graphs.graph_states import State, ChattyToolState
 from lang_agent.utils import make_llm
 
-from langchain_core.language_models import BaseChatModel
 from langchain_core.messages import SystemMessage, HumanMessage, AIMessage
 from langchain.agents import create_agent
 from langchain.chat_models import init_chat_model
@@ -26,7 +25,7 @@ class ToolNodeConfig(InstantiateConfig):
     tool_prompt_f:str = osp.join(osp.dirname(osp.dirname(osp.dirname(__file__))), "configs", "route_sys_prompts", "tool_prompt.txt")
 
 
-class ToolNode(GraphBase):
+class ToolNode(ToolNodeBase):
     def __init__(self, config: ToolNodeConfig, 
                        tool_manager:ToolManager,
                        memory:MemorySaver):
@@ -71,7 +70,7 @@ class ChattyToolNodeConfig(KeyConfig, ToolNodeConfig):
     chatty_sys_prompt_f:str = osp.join(osp.dirname(osp.dirname(osp.dirname(__file__))), "configs", "route_sys_prompts", "chatty_prompt.txt")
 
 
-class ChattyToolNode(GraphBase):
+class ChattyToolNode(ToolNodeBase):
     def __init__(self, config:ChattyToolNodeConfig, 
                        tool_manager:ToolManager,
                        memory:MemorySaver):
@@ -107,6 +106,9 @@ class ChattyToolNode(GraphBase):
         
         with open(self.config.tool_prompt_f, "r") as f:
             self.tool_sys_prompt = f.read()
+    
+    def get_streamable_tags(self):
+        return [["chatty_llm"], ["reit_llm"]]
 
     def invoke(self, state:State):
         self.tool_done = False