feat(tools/looker): add looker-agent tool

[hiracky16]

Description

This PR adds a new tool looker-agent to the Looker source. This tool enables Model Context Protocol (MCP) clients to manage Looker AI Agents programmatically.

Changes

• Implemented looker-agent tool in internal/tools/looker/lookeragent.
• Supported operations:
  • list: Search for available agents.
  • get: Retrieve details of a specific agent.
  • create: Create a new AI agent.
  • delete: Remove an existing agent.
• Added unit tests for configuration parsing and validation in internal/tools/looker/lookeragent/lookeragent_test.go.
• Added documentation in docs/en/resources/tools/looker-agent.md.

Impact

Allows LLMs to manage the lifecycle of Looker AI Agents, enabling more advanced agentic workflows within the Looker ecosystem.

PR Checklist

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🛠️ Fixes #2823

[gemini-code-assist]

Summary of Changes

Hello, 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!

This pull request introduces the looker-agent tool, which empowers Model Context Protocol (MCP) clients to programmatically interact with and manage Looker AI Agents. This enhancement facilitates more sophisticated agentic workflows within the Looker ecosystem by allowing Large Language Models (LLMs) to control the lifecycle of these agents.

Highlights

• New Tool Added: A new looker-agent tool has been implemented, enabling programmatic management of Looker AI Agents.
• Supported Operations: The looker-agent tool supports list, get, create, and delete operations for AI agents.
• Unit Tests: Unit tests were added to validate the configuration parsing and functionality of the looker-agent tool.
• Documentation: Comprehensive documentation for the looker-agent tool, including its configuration and usage, has been added.

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[gemini-code-assist]

Code Review

This pull request introduces a new looker-agent tool for managing Looker AI Agents. The implementation is clean and follows the existing structure for tools in this repository. My review includes a suggestion to use more appropriate HTTP status codes for client-side errors. Additionally, it appears a duplicate documentation file has been added, which should be cleaned up, and the Looker Go SDK version should be verified.

[drstrangelooker]

/gcbrun

[github-actions]

🔎 Preview at https://googleapis.github.io/genai-toolbox/previews/PR-2827/

[drstrangelooker]

Working in PR #2830 now.