docs(tutorial_langgraph.ipynb): fix duplicate description in LangGraph tools section

[bwnyasse]

• Remove duplicate description "Create custom Python functions to act as tools your AI application can use"

• Replace router description with more specific text about routing logic and tool selection

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[code-review-assist]

Hi team,

I'm currently reviewing this pull request and will have a full review in a few minutes. In the meantime, here's a quick summary for you and other reviewers to get up to speed:

This pull request, submitted by bwnyasse, aims to improve the tutorial_langgraph.ipynb notebook within the generative-ai repository. The primary goal is to fix a duplicate description in the LangGraph tools section.

Specifically, the changes include:

• Removing Duplicate Description: The duplicate description, "Create custom Python functions to act as tools your AI application can use," has been removed from the section describing the router.
• Improving Router Description: The description of the router has been updated to provide more specific information about its role in controlling conversation flow and tool selection. The updated description is now: "Set up routing logic to control conversation flow and tool selection."

The changes are localized to lines 107-113 of gemini/reasoning-engine/tutorial_langgraph.ipynb. The updated description provides a clearer and more accurate representation of the router's functionality.

Here's a little haiku to lighten the mood:

Code flows like a stream,
Fixes clear, a polished gem,
Docs now shine so bright.

Thanks,
Gemini

[code-review-assist]

This pull request effectively addresses the duplicate description and provides a more specific description for the router. This enhances the clarity and user experience of the tutorial. The change is minor but valuable. Well done!

[koverholt]

LGTM. Thanks for catching this and for the edits!