[问题/Issue] 章节7.4：习题代码 test_react_agent.py 中注册calculate实参顺序错误

[Nikolas-Cao]

1. 遇到问题的章节 / Affected Chapter

Chapter7.4.2

2. 问题类型 / Issue Type

代码错误 / Code Error

3. 具体问题描述 / Problem Description

# test_react_agent.py
def test_custom_prompt():
    try:
        from hello_agents import calculate
        tool_registry.register_function("calculate", calculate, "数学计算工具")   # 顺序错了
    except ImportError:
        pass

tool_registry.register_function 调用实参顺序错误，应该是 name, description, function

4. 问题重现材料 / Reproduction Materials

现象
按照原本的代码执行，则tool_registry.get_tools_description()返回

calculate: <function calculate at 0x0000021879853E20>

建议修改

 tool_registry.register_function("calculate", "数学计算工具", calculate)

改后效果

calculate: 数学计算工具

5. 补充信息 / Additional Information

No response

确认事项 / Verification

• 我已阅读过相关章节的文档 / I have read the relevant chapter documentation
• 我已搜索过现有的Issues,确认此问题未被报告 / I have searched existing Issues and confirmed this hasn't been reported
• 我已尝试过基本的故障排除(如重启、重新安装依赖等) / I have tried basic troubleshooting (restart, reinstall dependencies, etc.)