diff --git a/gradio_ui/agent/task_plan_agent.py b/gradio_ui/agent/task_plan_agent.py
index 0490576..46d3d2a 100644
--- a/gradio_ui/agent/task_plan_agent.py
+++ b/gradio_ui/agent/task_plan_agent.py
@@ -4,8 +4,19 @@ from gradio_ui.agent.base_agent import BaseAgent
 from xbrain.core.chat import run
 
 class TaskPlanAgent(BaseAgent):
-    def __call__(self, messages):
-        response = run(messages, user_prompt=system_prompt, response_format=TaskPlanResponse)
+    def __call__(self, messages, parsed_screen_result):
+        screen_info = str(parsed_screen_result['parsed_content_list'])
+        messages[-1] =  {"role": "user", 
+             "content": [
+                    {"type": "text", "text": messages[-1]["content"]},
+                    {
+                        "type": "image_url",
+                        "image_url": {"url": f"data:image/png;base64,{parsed_screen_result['base64_image']}"}
+                    }
+                ]
+            }
+        response = run(messages, user_prompt=system_prompt.format(screen_info=screen_info), response_format=TaskPlanResponse)
+        messages.append({"role": "assistant", "content": response})
         return json.loads(response)
 
 class Plan(BaseModel):
@@ -16,6 +27,7 @@ class Plan(BaseModel):
 
 
 class TaskPlanResponse(BaseModel):
+    reasoning: str = Field(description="描述您规划任务的逻辑")
     task_plan: list[Plan] = Field(description="具体的操作步骤序列")
 
 
@@ -23,6 +35,9 @@ system_prompt = """
 ### 目标 ###
 你是自动化操作规划专家，根据屏幕内容和用户需求，规划精确可执行的操作序列。
 
+当前屏幕内容如下：
+{screen_info}
+
 ### 输入 ###
 1. 用户需求：文本描述形式的任务目标
 2. 当前环境：屏幕上可见的元素和状态
@@ -30,13 +45,13 @@ system_prompt = """
 ### 输出格式 ###
 操作序列应采用以下JSON格式：
 [
-  {
+  {{
     "操作类型": "点击/输入/拖拽/等待/判断...",
     "目标元素": "元素描述或坐标",
     "参数": "具体参数，如文本内容",
     "预期结果": "操作后的预期状态",
     "错误处理": "操作失败时的替代方案"
-  },
+  }}
 ]
 
 ### 操作类型说明 ###
@@ -50,41 +65,41 @@ system_prompt = """
 输入：获取AI新闻
 输出：
 [
-  {
+  {{
     "操作类型": "点击",
     "目标元素": "浏览器图标",
     "参数": "无",
     "预期结果": "浏览器打开",
     "错误处理": "如未找到浏览器图标，尝试通过开始菜单搜索浏览器"
-  },
-  {
+  }},
+  {{
     "操作类型": "输入",
     "目标元素": "地址栏",
     "参数": "https://www.baidu.com",
     "预期结果": "百度首页加载完成",
     "错误处理": "如连接失败，重试或尝试其他搜索引擎"
-  },
-  {
+  }},
+  {{
     "操作类型": "输入",
     "目标元素": "搜索框",
     "参数": "AI最新新闻",
     "预期结果": "搜索框填充完成",
     "错误处理": "如搜索框不可用，尝试刷新页面"
-  },
-  {
+  }},
+  {{
     "操作类型": "点击",
     "目标元素": "搜索按钮",
     "参数": "无",
     "预期结果": "显示搜索结果页",
     "错误处理": "如点击无反应，尝试按回车键"
-  },
-  {
+  }},
+  {{
     "操作类型": "判断",
     "目标元素": "搜索结果列表",
     "参数": "包含AI相关内容",
     "预期结果": "找到相关新闻",
     "错误处理": "如无相关结果，尝试修改搜索关键词"
-  }
+  }}
 ]
 """
 
diff --git a/gradio_ui/agent/task_run_agent.py b/gradio_ui/agent/task_run_agent.py
index 564901d..387ae91 100644
--- a/gradio_ui/agent/task_run_agent.py
+++ b/gradio_ui/agent/task_run_agent.py
@@ -1,9 +1,6 @@
 import json
 import uuid
 from anthropic.types.beta import BetaMessage, BetaTextBlock, BetaToolUseBlock, BetaMessageParam, BetaUsage
-from PIL import ImageDraw
-import base64
-from io import BytesIO
 from pydantic import BaseModel, Field
 from gradio_ui.agent.base_agent import BaseAgent
 from xbrain.core.chat import run
@@ -13,22 +10,18 @@ class TaskRunAgent(BaseAgent):
     def __init__(self):
         self.OUTPUT_DIR = "./tmp/outputs"
        
-    def __call__(self, task_plan, parsed_screen, messages):
-        screen_info = str(parsed_screen['parsed_content_list'])
+    def __call__(self, task_plan, parsed_screen_result, messages):
+        screen_info = str(parsed_screen_result['parsed_content_list'])
         self.SYSTEM_PROMPT = system_prompt.format(task_plan=str(task_plan), 
                                                   device=self.get_device(), 
                                                   screen_info=screen_info)
-        img_to_show = parsed_screen["image"]
-        buffered = BytesIO()
-        img_to_show.save(buffered, format="PNG")
-        img_to_show_base64 = base64.b64encode(buffered.getvalue()).decode("utf-8")
         messages.append(
             {"role": "user", 
              "content": [
-                    {"type": "text", "text": "图片是当前屏幕的截图"},
+                    {"type": "text", "text": "Image is the screenshot of the current screen"},
                     {
                         "type": "image_url",
-                        "image_url": {"url": f"data:image/png;base64,{img_to_show_base64}"}
+                        "image_url": {"url": f"data:image/png;base64,{parsed_screen_result['base64_image']}"}
                     }
                 ]
             }
@@ -40,21 +33,6 @@ class TaskRunAgent(BaseAgent):
         )
         messages.append({"role": "assistant", "content": vlm_response})
         vlm_response_json = json.loads(vlm_response)
-        if "box_id" in vlm_response_json:
-            try:
-                bbox = parsed_screen["parsed_content_list"][int(vlm_response_json["box_id"])].coordinates
-                vlm_response_json["box_centroid_coordinate"] = [int((bbox[0] + bbox[2]) / 2 ), int((bbox[1] + bbox[3]) / 2 )]
-                x, y = vlm_response_json["box_centroid_coordinate"] 
-                radius = 10
-                draw = ImageDraw.Draw(img_to_show)
-                draw.ellipse((x - radius, y - radius, x + radius, y + radius), fill='red')
-                draw.ellipse((x - radius*3, y - radius*3, x + radius*3, y + radius*3), fill=None, outline='red', width=2)
-                buffered = BytesIO()
-                img_to_show.save(buffered, format="PNG")
-                img_to_show_base64 = base64.b64encode(buffered.getvalue()).decode("utf-8")
-            except Exception as e:
-                print(f"Error parsing: {vlm_response_json}")
-                print(f"Error: {e}")
         response_content = [BetaTextBlock(text=vlm_response_json["reasoning"], type='text')]
         if 'box_centroid_coordinate' in vlm_response_json:
             move_cursor_block = BetaToolUseBlock(id=f'toolu_{uuid.uuid4()}',
diff --git a/gradio_ui/agent/verification_agent.py b/gradio_ui/agent/verification_agent.py
index bce9009..05922cf 100644
--- a/gradio_ui/agent/verification_agent.py
+++ b/gradio_ui/agent/verification_agent.py
@@ -15,10 +15,10 @@ class VerificationAgent(BaseAgent):
         messages.append({"role": "assistant", "content": response})
         return json.loads(response)
 
-class VerificationResponse(BaseModel):  
+class VerificationResponse(BaseModel):
     verification_status: str = Field(description="验证状态", json_schema_extra={"enum": ["success", "error"]})
     verification_method: str = Field(description="验证方法")
-    evidence: str = Field(description="证据")
+    reasoning: str = Field(description="描述您验证的逻辑")
     failure_reason: str = Field(description="失败原因")
     remedy_measures: list[str] = Field(description="补救措施")
 
@@ -72,7 +72,7 @@ prompt = """
 {
   "verification_status": "success",
   "verification_method": "视觉验证+内容验证",
-  "evidence": "1. 检测到欢迎消息'你好，用户名' 2. 导航栏显示用户头像 3. URL已变更为首页地址",
+  "reasoning": "1. 检测到欢迎消息'你好，用户名' 2. 导航栏显示用户头像 3. URL已变更为首页地址",
   "failure_reason": "无",
   "remedy_measures": [],
 }
diff --git a/gradio_ui/app.py b/gradio_ui/app.py
index c8b4a67..399cc21 100644
--- a/gradio_ui/app.py
+++ b/gradio_ui/app.py
@@ -2,6 +2,7 @@
 python app.py --windows_host_url localhost:8006 --omniparser_server_url localhost:8000
 """
 
+import json
 import os
 from pathlib import Path
 import argparse
@@ -48,6 +49,8 @@ def setup_state(state):
     
     if "messages" not in state:
         state["messages"] = []
+    if "chatbox_messages" not in state:
+        state["chatbox_messages"] = []
     if "auth_validated" not in state:
         state["auth_validated"] = False
     if "responses" not in state:
@@ -99,13 +102,49 @@ def process_input(user_input, state, vision_agent_state):
             "content": user_input
         }
     )
-    yield state['messages'] 
+    state["chatbox_messages"].append(
+          {
+            "role": "user",
+            "content": user_input
+        }
+    )
+    yield state['chatbox_messages'] 
     agent = vision_agent_state["agent"]
     for _ in sampling_loop_sync(
         model=state["model"],
         messages=state["messages"],
         vision_agent = agent
-    ):  yield state['messages']
+    ):
+        state['chatbox_messages'] = []
+        for message in state['messages']:
+            # convert message["content"] to gradio chatbox format
+            if type(message["content"]) is list:
+                gradio_chatbox_content = ""
+                for content in message["content"]:
+                    # convert image_url to gradio image format
+                    if content["type"] == "image_url":
+                        gradio_chatbox_content += f'<br/><img src="{content['image_url']["url"]}">'
+                    # convert text to gradio text format
+                    elif content["type"] == "text":
+                        # agent response is json format and must contains reasoning
+                        if message["role"] == "assistant":
+                            content_json = json.loads(content["text"])
+                            gradio_chatbox_content += f'<br/><h3>{content_json["reasoning"]}</h3>'
+                            gradio_chatbox_content +=  f'<br/> <details> <summary>Detail</summary> <pre>{json.dumps(content_json, indent=4)}</pre> </details>'
+                        else:
+                            gradio_chatbox_content += content["text"]
+
+                state['chatbox_messages'].append({
+                    "role": message["role"],
+                    "content": gradio_chatbox_content
+                })
+            else:
+                state['chatbox_messages'].append({
+                    "role": message["role"],
+                    "content": message["content"]
+                })
+        yield state['chatbox_messages']
+               
 
 def stop_app(state):
     state["stop"] = True
@@ -202,7 +241,7 @@ def run():
                     autoscroll=True,
                     height=580,
                     type="messages")
-
+                
         def update_model(model, state):
             state["model"] = model
 
@@ -215,9 +254,10 @@ def run():
         def clear_chat(state):
             # Reset message-related state
             state["messages"] = []
+            state["chatbox_messages"] = []
             state["responses"] = {}
             state["tools"] = {}
-            return state['messages']
+            return state["chatbox_messages"]
 
         model.change(fn=update_model, inputs=[model, state], outputs=None)
         api_key.change(fn=update_api_key, inputs=[api_key, state], outputs=None)
diff --git a/gradio_ui/executor/anthropic_executor.py b/gradio_ui/executor/anthropic_executor.py
index 3a415dc..5c68de4 100644
--- a/gradio_ui/executor/anthropic_executor.py
+++ b/gradio_ui/executor/anthropic_executor.py
@@ -2,7 +2,10 @@ import asyncio
 import json
 from typing import Any, cast
 from anthropic.types.beta import (
-    BetaMessageParam
+    BetaMessageParam,
+    BetaContentBlockParam,
+    BetaToolResultBlockParam,
+    BetaContentBlock
 )
 from gradio_ui.tools import ComputerTool, ToolCollection
 
@@ -13,13 +16,21 @@ class AnthropicExecutor:
             ComputerTool()
         )
 
-    def __call__(self,messages: list[BetaMessageParam]):
-        content = json.loads(messages[-1]["content"])
-        if content["next_action"] is not None:
-            # Run the asynchronous tool execution in a synchronous context
-            result = asyncio.run(self.tool_collection.run(
-                name=content["next_action"],
-                tool_input=cast(dict[str, Any], content["value"]),
-            ))
-            messages.append({"role": "assistant", "content": "tool result:\n"+str(result)})
-        return messages
\ No newline at end of file
+    def __call__(self, response, messages):
+        tool_result_content: list[str] = []
+        for content_block in cast(list[BetaContentBlock], response.content):
+            # Execute the tool
+            if content_block.type == "tool_use":
+                # Run the asynchronous tool execution in a synchronous context
+                result = asyncio.run(self.tool_collection.run(
+                    name=content_block.name,
+                    tool_input=cast(dict[str, Any], content_block.input),
+                ))
+                tool_result_content.append(
+                    str(result)
+                )
+        messages.append({"role": "assistant", "content": "Run tool result:\n"+str(tool_result_content)})
+        if not tool_result_content:
+            return messages
+        
+        return tool_result_content
diff --git a/gradio_ui/loop.py b/gradio_ui/loop.py
index 7cfd3b9..eca8e07 100644
--- a/gradio_ui/loop.py
+++ b/gradio_ui/loop.py
@@ -1,18 +1,16 @@
 """
 Agentic sampling loop that calls the Anthropic API and local implenmentation of anthropic-defined computer use tools.
 """
-from collections.abc import Callable
+import base64
+from io import BytesIO
 from time import sleep
 import cv2
 from gradio_ui.agent.verification_agent import VerificationAgent
 from gradio_ui.agent.vision_agent import VisionAgent
 from gradio_ui.tools.screen_capture import get_screenshot
-from anthropic.types.beta import (
-    BetaMessageParam
-)
+from anthropic.types.beta import (BetaMessageParam)
 from gradio_ui.agent.task_plan_agent import TaskPlanAgent
 from gradio_ui.agent.task_run_agent import TaskRunAgent
-from gradio_ui.tools import ToolResult
 from gradio_ui.executor.anthropic_executor import AnthropicExecutor
 import numpy as np
 from PIL import Image
@@ -31,72 +29,76 @@ def sampling_loop_sync(
     print('in sampling_loop_sync, model:', model)
     task_plan_agent = TaskPlanAgent()
     executor = AnthropicExecutor()
-    plan_list = task_plan_agent(messages=messages)
-    yield
-    task_run_agent = TaskRunAgent()
     verification_agent = VerificationAgent()
+    task_run_agent = TaskRunAgent()
+    parsed_screen_result = parsed_screen(vision_agent)
+    plan_list = task_plan_agent(messages=messages, parsed_screen_result=parsed_screen_result)
+    yield
     for plan in plan_list:      
         execute_task_plan(plan, vision_agent, task_run_agent, executor, messages)
         yield
         sleep(2)
-        verification_loop(vision_agent, plan, verification_agent, executor, task_run_agent, messages)
+        verification_loop(vision_agent, verification_agent, executor, task_run_agent, messages)
         yield
 
-def verification_loop(vision_agent, plan, verification_agent, executor, task_run_agent, messages):
+def verification_loop(vision_agent, verification_agent, executor, task_run_agent, messages):
     """verification agent will be called in the loop"""
     while True:
-        # 验证结果
-        verification_result = verification_agent(plan["expected_result"], messages)
+        # verification result
+        verification_result = verification_agent( messages)
         yield
-        # 如果验证成功，返回结果
+        # if verification success, return result
         if verification_result["verification_status"] == "success":
             return
-        # 如果验证失败，执行补救措施
+        # if verification failed, execute remedy measures
         elif verification_result["verification_status"] == "error":
             execute_task_plan(verification_result["remedy_measures"], vision_agent, task_run_agent, executor, messages)
             yield 
 
 def execute_task_plan(plan, vision_agent, task_run_agent, executor, messages):
-    parsed_screen = parse_screen(vision_agent)
-    task_run_agent(task_plan=plan, parsed_screen=parsed_screen, messages=messages)
-    executor(messages)
+    parsed_screen_result = parsed_screen(vision_agent)
+    tools_use_needed, __ = task_run_agent(task_plan=plan, parsed_screen_result=parsed_screen_result, messages=messages)
+    executor(tools_use_needed, messages)
 
-def parse_screen(vision_agent: VisionAgent):
+def parsed_screen(vision_agent: VisionAgent):
     screenshot, screenshot_path = get_screenshot()
     response_json = {}
     response_json['parsed_content_list'] = vision_agent(str(screenshot_path))
     response_json['width'] = screenshot.size[0]
     response_json['height'] = screenshot.size[1]
     response_json['image'] = draw_elements(screenshot, response_json['parsed_content_list'])
+    buffered = BytesIO()
+    response_json['image'].save(buffered, format="PNG")
+    response_json['base64_image'] = base64.b64encode(buffered.getvalue()).decode("utf-8")
     return response_json
 
 def draw_elements(screenshot, parsed_content_list):
     """
-    将PIL图像转换为OpenCV兼容格式并绘制边界框
+    Convert PIL image to OpenCV compatible format and draw bounding boxes
     
     Args:
-        screenshot: PIL Image对象
-        parsed_content_list: 包含边界框信息的列表
+        screenshot: PIL Image object
+        parsed_content_list: list containing bounding box information
     
     Returns:
-        带有绘制边界框的PIL图像
+        PIL image with drawn bounding boxes
     """
-    # 将PIL图像转换为opencv格式
+    # convert PIL image to opencv format
     opencv_image = np.array(screenshot)
     opencv_image = cv2.cvtColor(opencv_image, cv2.COLOR_RGB2BGR)
-    # 绘制边界框
+    # draw bounding boxes
     for idx, element in enumerate(parsed_content_list):
         bbox = element.coordinates
         x1, y1, x2, y2 = bbox
-        # 转换坐标为整数
+        # convert coordinates to integers
         x1, y1, x2, y2 = int(x1), int(y1), int(x2), int(y2)
-        # 绘制矩形
+        # draw rectangle
         cv2.rectangle(opencv_image, (x1, y1), (x2, y2), (0, 0, 255), 2)
-        # 在矩形边框左上角绘制序号
+        # draw index number
         cv2.putText(opencv_image, str(idx+1), (x1, y1-10), 
                     cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 255), 2)
     
-    # 将OpenCV图像格式转换回PIL格式
+    # convert opencv image format back to PIL format
     opencv_image = cv2.cvtColor(opencv_image, cv2.COLOR_BGR2RGB)
     pil_image = Image.fromarray(opencv_image)
     
diff --git a/gradio_ui/tools/computer.py b/gradio_ui/tools/computer.py
index 88d79cc..f802a87 100644
--- a/gradio_ui/tools/computer.py
+++ b/gradio_ui/tools/computer.py
@@ -2,12 +2,9 @@ import base64
 import time
 from typing import Literal, TypedDict
 from PIL import Image
-from util import tool
 from anthropic.types.beta import BetaToolComputerUse20241022Param
 from .base import BaseAnthropicTool, ToolError, ToolResult
 from .screen_capture import get_screenshot
-import requests
-import re
 import pyautogui
 import pyperclip
 import platform
@@ -29,7 +26,9 @@ Action = Literal[
     "screenshot",
     "cursor_position",
     "hover",
-    "wait"
+    "wait",
+    "scroll_up",
+    "scroll_down"
 ]
 
 class Resolution(TypedDict):
@@ -65,7 +64,6 @@ class ComputerTool(BaseAnthropicTool):
 
     @property
     def options(self) -> ComputerToolOptions:
-        # 直接使用原始尺寸，不进行缩放
         return {
             "display_width_px": self.width,
             "display_height_px": self.height,
@@ -76,14 +74,12 @@ class ComputerTool(BaseAnthropicTool):
         return {"name": self.name, "type": self.api_type, **self.options}
 
 
-    def __init__(self, is_scaling: bool = False):
+    def __init__(self):
         super().__init__()
-        # Get screen width and height using Windows command
         self.display_num = None
         self.offset_x = 0
         self.offset_y = 0
-        self.width, self.height = self.get_screen_size()
-        print(f"screen size: {self.width}, {self.height}")
+        self.width, self.height = pyautogui.size()
         self.key_conversion = {"Page_Down": "pagedown",
                                "Page_Up": "pageup",
                                "Super_L": "win",
@@ -216,19 +212,3 @@ class ComputerTool(BaseAnthropicTool):
         # padding to top left
         padding_image.paste(screenshot, (0, 0))
         return padding_image
-
-   
-    def get_screen_size(self):
-        """Return width and height of the screen"""
-        try:
-            response = tool.execute_command(
-                ["python", "-c", "import pyautogui; print(pyautogui.size())"]
-            )
-            output = response['output'].strip()
-            match = re.search(r'Size\(width=(\d+),\s*height=(\d+)\)', output)
-            if not match:
-                raise ToolError(f"Could not parse screen size from output: {output}")
-            width, height = map(int, match.groups())
-            return width, height
-        except requests.exceptions.RequestException as e:
-            raise ToolError(f"An error occurred while trying to get screen size: {str(e)}")
\ No newline at end of file
diff --git a/gradio_ui/tools/screen_capture.py b/gradio_ui/tools/screen_capture.py
index 430aee2..2642741 100644
--- a/gradio_ui/tools/screen_capture.py
+++ b/gradio_ui/tools/screen_capture.py
@@ -13,10 +13,8 @@ def get_screenshot(resize: bool = False, target_width: int = 1920, target_height
     path = output_dir / f"screenshot_{uuid4().hex}.png"
     
     try:
-        # 使用 tool.capture_screen_with_cursor 替代 requests.get
         img_io = tool.capture_screen_with_cursor()
-        screenshot = Image.open(img_io)
-        
+        screenshot = Image.open(img_io)        
         if resize and screenshot.size != (target_width, target_height):
             screenshot = screenshot.resize((target_width, target_height))
         screenshot.save(path)
diff --git a/util/tool.py b/util/tool.py
index 309f32f..9c88577 100644
--- a/util/tool.py
+++ b/util/tool.py
@@ -1,38 +1,9 @@
 import os
-import shlex
-import subprocess
-import threading
 import pyautogui
 from PIL import Image
 from io import BytesIO
 
 
-computer_control_lock = threading.Lock()
-def execute_command(command, shell=False):
-    """Local function to execute a command."""
-    with computer_control_lock:
-        if isinstance(command, str) and not shell:
-            command = shlex.split(command)
-
-        # Expand user directory
-        for i, arg in enumerate(command):
-            if arg.startswith("~/"):
-                command[i] = os.path.expanduser(arg)
-
-        try:
-            result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell, text=True, timeout=120)
-            return {
-                'status': 'success',
-                'output': result.stdout,
-                'error': result.stderr,
-                'returncode': result.returncode
-            }
-        except Exception as e:
-            return {
-                'status': 'error',
-                'message': str(e)
-            }
-
 def capture_screen_with_cursor():
     """Local function to capture the screen with cursor."""
     cursor_path = os.path.join(os.path.dirname(__file__),"..","resources", "cursor.png")