optimize_pdf

THE RISK

Medium Risk

Why optimize_pdf needs a policy

This tool modifies an existing PDF file by optimizing it for size and performance. This is a reversible write operation (the original could be preserved), but it does modify/overwrite the document content and structure. It does not execute code, delete data irreversibly in the traditional sense, or involve financial transactions.

From the tool's definition Optimize PDF file size and performance

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

POLICY

How to control optimize_pdf

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "optimize_pdf": {
      "limits": [
        {
          "counter": "optimize_pdf_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

optimize_pdf stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 46 MCP PDF tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about optimize_pdf

What does the optimize_pdf tool do? +

Optimize PDF file size and performance. It is categorised as a Write tool in the MCP PDF MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on optimize_pdf? +

Register the MCP PDF MCP server in PolicyLayer and add a rule for optimize_pdf: 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 PDF. Nothing to install.

What risk level is optimize_pdf? +

optimize_pdf is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit optimize_pdf? +

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

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

optimize_pdf is provided by the MCP PDF MCP server (rsp2k/mcp-pdf). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP PDF tool call.

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

CHECK YOUR STACK →