Gemini CLI Extension - Looker Conversational Analytics

Note

This extension is currently in beta (pre-v1.0), and may see breaking changes until the first stable release (v1.0).

This Gemini CLI extension provides a set of tools to interact with Looker instances. It allows you to manage your Looks, dashboards, and explores directly from the Gemini CLI, using natural language prompts.

Learn more about Gemini CLI Extensions.

Important

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Why Use the Looker Extension?

• Seamless Workflow: Stay in your CLI. No need to constantly switch contexts.
• Connect to Looker: Securely connect to your Looker instances.
• Natural Language Usage: Stop wrestling with complex commands. List models, explores, and dimensions, and run Looks and queries by describing what you want in plain English.

Prerequisites

Before you begin, ensure you have the following:

• Gemini CLI installed with version +v0.6.0.
• Setup Gemini CLI Authentication.
• A Looker instance with API access enabled.
• A Google Cloud project with the appropriate APIs enabled.

Getting Started

Installation

To install the extension, use the command:

gemini extensions install https://github.com/gemini-cli-extensions/looker-conversational-analytics

Configuration

You will need a Looker Client Id and Client Secret. These can be obtained by following the directions at Looker API authentication. If you don't have access to the Admin pages of the Looker system, you will need to ask your administrator to get the Id and Secret for you.

You will need a Google Cloud project with the appropriate APIS enabled. Use the following command to enable those APIs:

gcloud services enable geminidataanalytics.googleapis.com --project=$PROJECT_ID
gcloud services enable cloudaicompanion.googleapis.com --project=$PROJECT_ID

In addition to setting the ADC for your server, you need to ensure the IAM identity has been given the following IAM roles (or corresponding permissions):

• roles/looker.instanceUser
• roles/cloudaicompanion.user
• roles/geminidataanalytics.dataAgentStatelessUser

To initialize the application default credential run gcloud auth login --update-adc in your environment before starting MCP Toolbox.

Set the following environment variables before starting the Gemini CLI. These variables can be loaded from a .env file.

export LOOKER_BASE_URL="<your-looker-instance-url>"  # e.g. `https://looker.example.com`. You may need to add the port, i.e. `:19999`.
export LOOKER_CLIENT_ID="<your-looker-client-id>"
export LOOKER_CLIENT_SECRET="<your-looker-client-secret>"
export LOOKER_VERIFY_SSL="true" # Optional, defaults to true
export LOOKER_PROJECT="<your-google-cloud-project-id>"
export LOOKER_LOCATION="<your-google-cloud-location-id>"

Start Gemini CLI

To start the Gemini CLI, use the following command:

gemini

Usage

You can ask questions and give commands such as these:

1. What models are available in my Looker instance?
2. What explores are available in model_name?
3. What questions can I ask of the explore explore_name in model model_name?

Supported Tools

• get_models: Use this tool to list the LookML models in Looker.
• get_explores: Use this tool to list the explores in a given model.
• ask_data_insights: Use this tool to ask a natural language questions of an explore.

Additional Extensions

Find additional extensions to support your entire software development lifecycle at github.com/gemini-cli-extensions.

Troubleshooting

Use gemini --debug to enable debugging.

Common issues:

• "failed to find default credentials: google: could not find default credentials.": Ensure Application Default Credentials are available in your environment. See Set up Application Default Credentials for more information.
• "✖ Error during discovery for server: MCP error -32000: Connection closed": The database connection has not been established. Ensure your configuration is set via environment variables.
• "✖ MCP ERROR: Error: spawn /Users/USER/.gemini/extensions/cloud-sql-sqlserver/toolbox ENOENT": The Toolbox binary did not download correctly. Ensure you are using Gemini CLI v0.6.0+.
• "cannot execute binary file": The Toolbox binary did not download correctly. Ensure the correct binary for your OS/Architecture has been downloaded. See Installing the server for more information.