Remove authentication from MCP server and add demo video link

- Remove all authentication-related code from servers/mcpgw/server.py
  - Removed global auth state variables (_session_cookie, _auth_lock)
  - Removed Credentials class and _ensure_authenticated function
  - Removed username, password, session_cookie parameters from all tools
  - Simplified _call_registry_api to make direct API calls
  - Authentication now handled centrally by auth_server
- Add demo video link to Agent Integration section in docs/dynamic-tool-discovery.md
- Improved separation of concerns and reduced code complexity

Author: aarora79

agents/.env.template

@@ -19,4 +19,7 @@ AWS_REGION=us-east-1
 
 # Secret key for session cookie signing (must match registry SECRET_KEY), string of hex characters
 # To generate: python -c 'import secrets; print(secrets.token_hex(32))'
-SECRET_KEY=your-secret-key-here
+SECRET_KEY=your-secret-key-here
+
+# Either http://localhost:8000 or the HTTPS URL of your deployed MCP Gateway
+REGISTRY_URL=your_registry_url_here

agents/agent.py

@@ -596,7 +596,7 @@ async def main():
         # Initialize MCP client with the server configuration and authentication headers
         client = MultiServerMCPClient(
             {
-                "default_server": {
+                "mcp_registry": {
                     "url": server_url,
                     "transport": "sse",
                     "headers": auth_headers

agents/cli_user_auth.py

@@ -42,7 +42,7 @@
 script_dir = Path(__file__).parent
 env_file = script_dir / '.env.user'
 if env_file.exists():
-    load_dotenv(env_file)
+    load_dotenv(env_file, override=True)
     logger.info(f"Loaded environment variables from {env_file}")
 else:
     logger.warning(f"No .env file found at {env_file}")

docs/dynamic-tool-discovery.md

@@ -143,6 +143,8 @@ if weather_tools:
 
 The more powerful approach is when AI agents themselves use dynamic tool discovery autonomously. The agent has access to both `intelligent_tool_finder` and `invoke_mcp_tool` as available tools, allowing it to discover and execute new capabilities on-demand.
 
+**Demo Video**: [Watch the agent integration in action](https://github.com/user-attachments/assets/cee1847d-ecc1-406b-a83e-ebc80768430d)
+
 #### System Prompt Configuration
 
 Agents are configured with instructions on how to use dynamic tool discovery: