Docs: Add missing docstring to get_weather function (in README.md)

[Abbas-Asad]

Summary

Added a missing docstring to the get_weather function (in README.md) in Functions example to improve code documentation and tool description.

Problem

The get_weather function in README.md was missing a proper docstring, which is important for:

• Clear function documentation and readability
• Helping language models understand the tool's purpose and when to use it
• Following Python best practices for function documentation

Changes Made

Added a concise, one-line docstring to the get_weather function in README.md:

@function_tool
def get_weather(city: str) -> str:
    """Get the current weather for a given city."""
    return f"The weather in {city} is sunny."

[seratch]

Thanks for sending this. However, in this case, the method name tells what it is, so actually there is no need to have the docstring to make it functional.