Fetch a website and return its unmodified contents as HTML
AI agents call fetch_html to retrieve information from Mcp Fetch Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation: it retrieves web content and returns it as-is. There are no write, delete, execute, or financial operations. The worst-case misuse would be reconnaissance or data gathering, which carries low blast radius. The 'fetch' family of tools on this server are all read operations (fetch_json, fetch_markdown, fetch_readable, fetch_txt, fetch_youtube_transcript confirm this pattern).
From the tool's definition Tool name and description: 'Fetch a website and return its unmodified contents as HTML' — retrieves and returns data without modification or side effects.
Attacks that exploit this kind of access
Fetch a website and return its unmodified contents as HTML. It is categorised as a Read tool in the Mcp Fetch Server MCP Server, which means it retrieves data without modifying state.
Register the Mcp Fetch Server MCP server in PolicyLayer and add a rule for fetch_html: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Fetch Server. Nothing to install.
fetch_html is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the fetch_html rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for fetch_html. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
fetch_html is provided by the Mcp Fetch Server MCP server (mcp-fetch-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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