feat(genai): Adding tools samples

[Guiners]

Description

Fixes #

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• Tests pass: npm test (see Testing)
• Lint pass: npm run lint (see Style)
• Required CI tests pass (see CI testing)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new sample directory, and I created GitHub Actions workflow for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

Note: Any check with (dev), (experimental), or (legacy) can be ignored and should not block your PR from merging (see CI testing).

[gemini-code-assist]

Summary of Changes

Hello @Guiners, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

I've added several new samples demonstrating the use of various Generative AI tools within the genai module. These samples showcase capabilities such as code execution, function definition, Google Search integration, and Vertex AI Search (VAIS) with text inputs. The goal is to provide clear, runnable examples for developers to understand and utilize these powerful AI features.

Highlights

• New Generative AI Tool Samples: Introduced new samples for Generative AI tools, expanding the genai module's capabilities.
• Code Execution with Image Sample: Added a tools-code-exec-with-txt-local-img sample, demonstrating code execution with both text prompts and local image inputs.
• Function Definition Sample: Included a tools-func-def-with-txt sample, illustrating how to define and use custom functions with text-based interactions.
• Google Search Integration Sample: Provided a tools-google-search-with-txt sample, showcasing integration with Google Search for answering queries.
• Vertex AI Search (VAIS) Sample: Added a tools-vais-with-txt sample, demonstrating the use of Vertex AI Search for retrieval-augmented generation.
• Model and Test Updates: Updated existing tools-code-exec-with-txt and tools-func-desc-with-txt samples to use the latest gemini-2.5-flash model and adjusted test timeouts for stability.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in issue comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments or fill out our survey to provide feedback.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request adds several new GenAI tools samples and their corresponding tests. The changes are generally good, but there are a few issues to address. There's a critical issue with a sample marked as "not working". Another sample has a bug where it uses an environment variable instead of a function parameter. Several tests have incorrect assertions or use async on describe blocks unnecessarily. I've provided specific comments and suggestions to fix these issues.

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• genai/tools/tools-code-exec-with-txt-local-img.js:17, tag googlegenaisdk_tools_code_exec_with_txt
• genai/tools/tools-google-search-with-txt.js:17, tag googlegenaisdk_tools_google_search_with_txt
• genai/tools/tools-vais-with-txt.js:17, tag googlegenaisdk_tools_vais_with_txt

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment