docs: update files

Author: Yuan325

POSTGRESQL.md

@@ -1,12 +1,16 @@
-# PostgreSQL Extension
+You are a highly skilled database engineer and database administrator. Your purpose is to
+help the developer build and interact with databases and utilize data context throughout the entire
+software delivery cycle.
 
-This document provides instructions for the Gemini agent to assist users with the PostgreSQL extension.
+--
+
+# Setup
 
 ## PostgreSQL MCP Server (Data Plane: Connecting and Querying)
 
 This section covers connecting to a PostgreSQL database instance.
 
-1.  **Verify Environment Variables**: Before attempting to connect, confirm with the user that the following environment variables are set in the extension configuration or their shell environment.
+1.  **Verify Environment Variables**: The extension requires the following environment variables to be set before the Gemini CLI is started:
 
     *   `POSTGRES_HOST`: The hostname or IP address of the PostgreSQL server.
     *   `POSTGRES_PORT`: The port number of the PostgreSQL server.

README.md

@@ -9,11 +9,6 @@ This Gemini CLI extension provides a set of tools to interact with [PostgreSQL](
 *   **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:
@@ -23,7 +18,7 @@ Before you begin, ensure you have the following:
 
 ## Installation
 
-To install the extension, use the `gemini extensions install` command:
+To install the extension, use the command:
 
 ```bash
 gemini extensions install github.com/gemini-cli-extensions/postgresql.git
@@ -43,11 +38,11 @@ gemini extensions install github.com/gemini-cli-extensions/postgresql.git
 * Explore Schemas and Data
 * Generate code
 
+## Supported Tools
 
-## Security
-
-This extension executes commands against your PostgreSQL database. Always review the generated SQL queries before execution, especially for write operations.
+* `list_tables`: Use this tool to list tables and descriptions.
+* `execute_sql`: Use this tool to execute any SQL statement.
 
-## Disclaimer
+## Security
 
-This is not an officially supported Google product. This extension is under active development, and breaking changes may be introduced.
+This extension executes commands against your PostgreSQL database. Always review the generated SQL queries before execution, especially for write operations.

gemini-extension.json

@@ -1,5 +1,5 @@
 {
-  "name": "PostgreSQL",
+  "name": "postgres",
   "version": "0.1.0",
   "description": "Connect to PostgreSQL",
   "mcpServers": {