docs: Update README.md (#5)

Author: averikitsch

README.md

@@ -36,6 +36,7 @@ Set the following environment variables before starting the Gemini CLI:
 * `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.
+* `CLOUD_SQL_MSSQL_IP_TYPE`: (Optional) The IP type i.e. “Public” or “Private” (Default: Public).
 
 > [!NOTE]
 > When using private IPs with Cloud SQL for SQL Server, you must use a Virtual Private Cloud (VPC) network.
@@ -53,8 +54,8 @@ Interact with Cloud SQL for SQL Server using natural language:
 
 ## Supported Tools
 
-* `list-tables`: Use this tool to list tables and descriptions.
-* `execute-sql`: Use this tool to execute any SQL statement.
+* `list_tables`: Use this tool to list tables and descriptions.
+* `execute_sql`: Use this tool to execute any SQL statement.
 
 ## Additional Extensions