parse_url

THE RISK

Low Risk

Why parse_url needs a policy

This tool fetches and reads content from external URLs without modifying any data. It is a read/retrieval operation. Medium severity because it makes outbound network requests and could potentially be used to access internal network resources or leak data about what URLs are being visited, but it has no write or destructive capabilities.

From the tool's definition "parse content from a URL" - retrieves and parses content from webpages, PDFs, and YouTube videos

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

POLICY

How to control parse_url

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

policy.json

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

parse_url 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 Roam Research MCP Server — 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

More Roam Research MCP Server tools

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All 26 Roam Research MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

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 →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about parse_url

What does the parse_url tool do? +

Intelligently parse content from a URL - supports webpages, PDFs, and YouTube videos. It is categorised as a Read tool in the Roam Research MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on parse_url? +

Register the Roam Research MCP Server MCP server in PolicyLayer and add a rule for parse_url: 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 Roam Research MCP Server. Nothing to install.

What risk level is parse_url? +

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

Can I rate-limit parse_url? +

Yes. Add a rate_limit block to the parse_url 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 parse_url completely? +

Set action: deny in the PolicyLayer policy for parse_url. 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 parse_url? +

parse_url is provided by the Roam Research MCP Server MCP server (philosolares/roam-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Roam Research MCP Server tool call.

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

CHECK YOUR STACK →