docs: 优化文档准确性和安装说明

- 修正 Agent Skills 描述,明确区分 -e 和 --enhance 机制
- 简化 INSTALL.md,对齐 README.md 的清晰结构
- 移除不必要的远程安装参数说明
- 优化 MCP 工具配置说明

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

GETTING_STARTED.md

@@ -275,20 +275,31 @@ This command will:
 
 ## Advanced Usage: Agent Skills
 
-Agent Skills are modular, reusable capabilities that extend the AI's functionality. They are stored in the `.claude/skills/` directory and are invoked automatically by the model based on your request.
+Agent Skills are modular, reusable capabilities that extend the AI's functionality. They are stored in the `.claude/skills/` directory and are invoked through specific trigger mechanisms.
 
 ### How Skills Work
 
 -   **Model-Invoked**: Unlike slash commands, you don't call Skills directly. The AI decides when to use a Skill based on its understanding of your goal.
 -   **Contextual**: Skills provide specific instructions, scripts, and templates to the AI for specialized tasks.
--   **Example**: The built-in `prompt-enhancer` skill is triggered when you use the `--enhance` flag, automatically refining your prompt for better results.
+-   **Trigger Mechanisms**:
+    -   **Conversational Trigger**: Use `-e` or `--enhance` flag in **natural conversation** to trigger the `prompt-enhancer` skill
+    -   **CLI Command Enhancement**: Use `--enhance` flag in **CLI commands** for prompt refinement (this is a CLI feature, not a skill trigger)
 
+### Examples
+
+**Conversational Trigger** (activates prompt-enhancer skill):
+```
+User: "Analyze authentication module -e"
+→ AI uses prompt-enhancer skill to expand the request
+```
+
+**CLI Command Enhancement** (built-in CLI feature):
 ```bash
-# Using a command that triggers the prompt-enhancer skill
+# The --enhance flag here is a CLI parameter, not a skill trigger
 /cli:analyze --enhance "check for security issues"
 ```
 
-In this case, the `prompt-enhancer` skill activates to expand your brief request into a detailed, structured prompt for the security analysis.
+**Important Note**: The `-e` flag works in natural conversation, but `--enhance` in CLI commands is a separate enhancement mechanism, not the skill system.
 
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