Update README.md

Author: anubhav756

README.md

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-# cloud-sql-sqlserver-observability
+# Gemini CLI Extension - Cloud SQL for SQL Server
+
+This Gemini CLI extension provides a set of tools to interact with [Cloud SQL for SQL Server](https://cloud.google.com/sql/docs/sqlserver) instances. It allows you to manage your databases, execute queries, and explore schemas directly from the [Gemini CLI](https://google-gemini.github.io/gemini-cli/), using natural language prompts.
+
+## Features
+
+*   **Integrated with Gemini CLI:** As a Google-developed extension, it integrates seamlessly into the Gemini CLI environment, making security an accessible part of your workflow.
+*   **Connect to Cloud SQL for SQL Server:** Securely connect to your Cloud SQL for SQL Server instances.
+*   **Explore Database Schema:** List databases, tables, views, and schemas.
+*   **Query your Database:** Execute SQL queries against your database.
+
+## Supported Tools
+
+* list-tables: Use this tool to list tables and descriptions.
+* execute-sql: Use this tool to execute any SQL statement.
+
+## Prerequisites
+
+Before you begin, ensure you have the following:
+
+*   [Gemini CLI](https://github.com/google-gemini/gemini-cli) installed.
+*   A Google Cloud project with the **Cloud SQL Admin API** enabled.
+*   IAM Permissions
+
+## Installation
+
+To install the extension, use the command:
+
+```bash
+gemini extensions install github.com/gemini-cli-extensions/cloud-sql-sqlserver.git
+```
+
+## Configuration
+
+*   `CLOUD_SQL_MSSQL_PROJECT`: The GCP project ID.
+*   `CLOUD_SQL_MSSQL_REGION`: The region of your Cloud SQL instance.
+*   `CLOUD_SQL_MSSQL_INSTANCE`: The ID of your Cloud SQL instance.
+*   `CLOUD_SQL_MSSQL_DATABASE`: The name of the database to connect to.
+*   `CLOUD_SQL_MSSQL_IP_ADDRESS`: The IP address of the Cloud SQL instance.
+*   `CLOUD_SQL_MSSQL_USER`: The database username.
+*   `CLOUD_SQL_MSSQL_PASSWORD`: The password for the database user.
+
+
+## Usage
+
+* Provision Infrastructure
+* Explore Schemas and Data
+* Generate code
+
+
+## Security
+
+This extension executes commands against your Cloud SQL for SQL Server database. Always review the generated SQL queries before execution, especially for write operations.
+
+## Disclaimer
+
+This is not an officially supported Google product. This extension is under active development, and breaking changes may be introduced.