diff --git a/lagent/agents/aggregator/tool_aggregator.py b/lagent/agents/aggregator/tool_aggregator.py
index 58e492c2..0ea47379 100644
--- a/lagent/agents/aggregator/tool_aggregator.py
+++ b/lagent/agents/aggregator/tool_aggregator.py
@@ -2,8 +2,7 @@
 
 from lagent.agents.aggregator.default_aggregator import DefaultAggregator
 from lagent.memory.base_memory import Memory
-from lagent.prompts.parsers.tool_parser import MixedToolParser, ToolParser
-from lagent.schema import AgentStatusCode
+from lagent.prompts.parsers.tool_parser import MixedToolParser, ToolParser, ToolStatusCode
 
 
 class InternLMToolAggregator(DefaultAggregator):
@@ -84,7 +83,7 @@ def aggregate(self,
             if message.sender == name:
                 if isinstance(message.formatted, dict):
                     parsed = message.formatted
-                    if parsed['status'] == AgentStatusCode.SESSION_INVALID_ARG:
+                    if parsed['status'] == ToolStatusCode.PARSING_ERROR:
                         continue
                     _message.append(
                         dict(
diff --git a/lagent/agents/stream.py b/lagent/agents/stream.py
index f7a86074..cd41fc0a 100644
--- a/lagent/agents/stream.py
+++ b/lagent/agents/stream.py
@@ -9,8 +9,8 @@
 from lagent.hooks import InternLMActionProcessor
 from lagent.llms import BaseLLM
 from lagent.memory import Memory
-from lagent.prompts.parsers import InterpreterParser, MixedToolParser, PluginParser
-from lagent.schema import AgentMessage, AgentStatusCode
+from lagent.prompts.parsers import InterpreterParser, MixedToolParser, PluginParser, ToolStatusCode
+from lagent.schema import AgentMessage
 from lagent.utils import create_object
 
 API_PREFIX = (
@@ -81,7 +81,7 @@ def __init__(
         action_hooks: List = [dict(type=InternLMActionProcessor)],
         finish_condition: Callable[
             [AgentMessage],
-            bool] = lambda m: m.formatted['status'] == AgentStatusCode.END,
+            bool] = lambda m: m.formatted['status'] == ToolStatusCode.NO_TOOL,
         max_turn: int = 4,
         **kwargs,
     ):
@@ -165,7 +165,7 @@ def __init__(
         action_hooks: List = [dict(type=InternLMActionProcessor)],
         finish_condition: Callable[
             [AgentMessage],
-            bool] = lambda m: m.formatted['status'] == AgentStatusCode.END,
+            bool] = lambda m: m.formatted['status'] == ToolStatusCode.NO_TOOL,
         max_turn: int = 6,
         **kwargs,
     ):
@@ -205,7 +205,7 @@ def __init__(
         action_hooks: List = [dict(type=InternLMActionProcessor)],
         finish_condition: Callable[
             [AgentMessage],
-            bool] = lambda m: m.formatted['status'] == AgentStatusCode.END,
+            bool] = lambda m: m.formatted['status'] == ToolStatusCode.NO_TOOL,
         max_turn: int = 4,
         **kwargs,
     ):
@@ -289,7 +289,7 @@ def __init__(
         action_hooks: List = [dict(type=InternLMActionProcessor)],
         finish_condition: Callable[
             [AgentMessage],
-            bool] = lambda m: m.formatted['status'] == AgentStatusCode.END,
+            bool] = lambda m: m.formatted['status'] == ToolStatusCode.NO_TOOL,
         max_turn: int = 6,
         **kwargs,
     ):
diff --git a/lagent/prompts/parsers/__init__.py b/lagent/prompts/parsers/__init__.py
index de99b797..d9b2ce25 100644
--- a/lagent/prompts/parsers/__init__.py
+++ b/lagent/prompts/parsers/__init__.py
@@ -1,9 +1,9 @@
 from .custom_parser import CustomFormatParser
 from .json_parser import JSONParser
 from .str_parser import StrParser
-from .tool_parser import InterpreterParser, MixedToolParser, PluginParser, ToolParser
+from .tool_parser import InterpreterParser, MixedToolParser, PluginParser, ToolParser, ToolStatusCode
 
 __all__ = [
     'CustomFormatParser', 'JSONParser', 'StrParser', 'ToolParser',
-    'InterpreterParser', 'PluginParser', 'MixedToolParser'
+    'InterpreterParser', 'PluginParser', 'MixedToolParser', 'ToolStatusCode'
 ]
diff --git a/lagent/prompts/parsers/tool_parser.py b/lagent/prompts/parsers/tool_parser.py
index 3836dcb3..53433127 100644
--- a/lagent/prompts/parsers/tool_parser.py
+++ b/lagent/prompts/parsers/tool_parser.py
@@ -1,10 +1,10 @@
 import json
+from enum import IntEnum
 
 # import re
 from typing import Any, Callable, List, Optional
 
 from lagent.prompts.parsers import StrParser
-from lagent.schema import AgentStatusCode
 from lagent.utils import create_object, load_class_from_string
 
 
@@ -15,6 +15,12 @@ def default_plugin_validate(plugin: str):
     return json.loads(plugin)
 
 
+class ToolStatusCode(IntEnum):
+    NO_TOOL = 0
+    VALID_TOOL = 1
+    PARSING_ERROR = -1
+
+
 class ToolParser(StrParser):
 
     def __init__(self,
@@ -34,28 +40,20 @@ def __init__(self,
             validate, str) else validate
 
     def parse_response(self, data: str) -> dict:
-        # match = self.pattern.search(data)
-        # if not match:
-        #     return dict(
-        #         tool_type=None,
-        #         thought=data,
-        #         action=None,
-        #         status=AgentStatusCode.END)
-        # thought, action = match.group(1), match.group(2).strip()
         if self.format_field['begin'] not in data:
             return dict(
                 tool_type=None,
                 thought=data,
                 action=None,
-                status=AgentStatusCode.END)
+                status=ToolStatusCode.NO_TOOL)
         thought, action, *_ = data.split(self.format_field["begin"])
         action = action.split(self.format_field['end'])[0]
-        status = AgentStatusCode.STREAM_ING
+        status = ToolStatusCode.VALID_TOOL
         if self.validate:
             try:
                 action = self.validate(action)
             except Exception:
-                status = AgentStatusCode.SESSION_INVALID_ARG
+                status = ToolStatusCode.PARSING_ERROR
         return dict(
             tool_type=self.tool_type,
             thought=thought,
@@ -131,7 +129,7 @@ def parse_response(self, data: str) -> dict:
             tool_type=None,
             thought=data,
             action=None,
-            status=AgentStatusCode.END)
+            status=ToolStatusCode.NO_TOOL)
         for name, parser in self.parsers.items():
             res = parser.parse_response(data)
             if res['tool_type'] == name:
diff --git a/lagent/schema.py b/lagent/schema.py
index cb16c9c4..668846fb 100644
--- a/lagent/schema.py
+++ b/lagent/schema.py
@@ -88,7 +88,6 @@ class AgentStatusCode(IntEnum):
 
 
 class AgentMessage(BaseModel):
-
     content: Any
     sender: str = 'user'
     formatted: Optional[Any] = None