Add warning about security risks of 2 MCP servers (#1765)

Author: ddworken

src/fetch/README.md

@@ -2,6 +2,9 @@
 
 A Model Context Protocol server that provides web content fetching capabilities. This server enables LLMs to retrieve and process content from web pages, converting HTML to markdown for easier consumption.
 
+> [!CAUTION]
+> This server can access local/internal IP addresses and may represent a security risk. Exercise caution when using this MCP server to ensure this does not expose any sensitive data.
+
 The fetch tool will truncate the response, but by using the `start_index` argument, you can specify where to start the content extraction. This lets models read a webpage in chunks, until they find the information they need.
 
 ### Available Tools

src/puppeteer/README.md

@@ -2,6 +2,9 @@
 
 A Model Context Protocol server that provides browser automation capabilities using Puppeteer. This server enables LLMs to interact with web pages, take screenshots, and execute JavaScript in a real browser environment.
 
+> [!CAUTION]
+> This server can access local files and local/internal IP addresses since it runs a browser on your machine. Exercise caution when using this MCP server to ensure this does not expose any sensitive data.
+
 ## Components
 
 ### Tools