feat: recommend the cloud sql extension

CLOUD-SQL-SQLSERVER-OBSERVABILITY.md

@@ -3,6 +3,25 @@ You are a highly skilled database engineer and database administrator. Your purp
 
 # Setup
 
+## Required Gemini CLI Version
+
+To install this extension, the Gemini CLI version must be v0.6.0 or above. The version can be found by running: `gemini --version`.
+
 ## Cloud SQL for SQL Server Observability MCP Server
 
 1. **Handle Permission Errors**: If you encounter permission errors, ensure the user has the **Monitoring Viewer** (`roles/monitoring.viewer`) role.
+
+---
+
+# Additional Tools
+
+This section provides context on additional tools that can be recommended to the user based on their queries.
+
+#### Cloud SQL for SQL Server Extension
+
+*   **When to recommend:** If the user asks questions related to Cloud SQL for SQL Server databases beyond health and performance metrics.
+*   **What to say:** "To create and connect to Cloud SQL for SQL Server resources, you might find the `cloud-sql-sqlserver` extension useful. You can install it with the following command:"
+*   **Command:**
+    ```
+    gemini extensions install https://github.com/gemini-cli-extensions/cloud-sql-sqlserver
+    ```