Update README.md

README.md

@@ -109,6 +109,8 @@ max_tokens: 16384
 
 ### Recommended System Prompt
 
+We use this unified XML-wrapped JSON format to describe and organize all tools. If you have additional tools, please document them using the same structure and formatting to ensure consistent parsing, compatibility, and optimal performance across the environment.
+
 <details>
   <summary>Click to expand system prompt example</summary>
 
@@ -226,14 +228,21 @@ Input JSON schema: {'properties': {'url': {'title': 'Url', 'type': 'string'}, 'i
 You accomplish a given task iteratively, breaking it down into clear steps and working through them methodically.
 ```
 
-Note: We use this unified XML-wrapped JSON format to describe and organize all MCP tools. If you have additional tools, please document them using the same structure and formatting to ensure consistent parsing, compatibility, and optimal performance across the MCP environment.
-
 </details>
 
 ### Minimal Runnable Example
 
 The following example shows how to run a MCP-style tool-calling workflow, including system prompt generation, model invocation, tool execution, and final response generation.
 
+Before running the script, make sure to set the required environment variables:
+
+```bash
+export OPENAI_API_KEY="your-api-key-here"
+export BASE_URL="https://your-model-endpoint.example.com/v1"
+```
+
+Example:
+
 ```python
 import json
 import os