extract_feeds

THE RISK

Low Risk

Why extract_feeds needs a policy

This tool retrieves and parses RSS/Atom feed metadata from web pages. It performs data discovery and querying without creating, modifying, deleting, executing code, or committing financial transactions. The operation is read-only, has minimal blast radius (retrieving public feed data), and aligns with the 'Read' category of tools that retrieve or query data with no side effects.

From the tool's definition Tool name 'extract_feeds' and description 'Discover and parse RSS/Atom feeds from web pages' indicate retrieval and parsing of publicly available feed data with no modification or side effects.

Documented attack patterns abuse exactly the kind of access extract_feeds gives an agent:

POLICY

How to control extract_feeds

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Web Scrape, and nothing reaches the server without passing your rules. This is the rule we recommend for extract_feeds:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "extract_feeds": {}
  }
}

extract_feeds is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP Web Scrape — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about extract_feeds

What does the extract_feeds tool do? +

Discover and parse RSS/Atom feeds from web pages. It is categorised as a Read tool in the MCP Web Scrape MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on extract_feeds? +

Register the MCP Web Scrape MCP server in PolicyLayer and add a rule for extract_feeds: 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 Web Scrape. Nothing to install.

What risk level is extract_feeds? +

extract_feeds is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit extract_feeds? +

Yes. Add a rate_limit block to the extract_feeds 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.

How do I block extract_feeds completely? +

Set action: deny in the PolicyLayer policy for extract_feeds. 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.

What MCP server provides extract_feeds? +

extract_feeds is provided by the MCP Web Scrape MCP server (mukul975/mcp-web-scrape). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Web Scrape tool call.

Start from MCP Web Scrape, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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