close-pdf

THE RISK

Low Risk

Why close-pdf needs a policy

Closing a PDF file is a resource management operation. It frees the in-memory or handle reference to an open file but does not modify, delete, or transmit any data. No side effects beyond releasing the resource, so it fits 'Other' as the closest category.

From the tool's definition 'Close an open PDF file' — this action releases a file handle/resource in memory, it does not read, write, execute, delete, or perform financial operations.

Documented attack patterns abuse exactly the kind of access close-pdf gives an agent:

POLICY

How to control close-pdf

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Pdf Reader, and nothing reaches the server without passing your rules. This is the rule we recommend for close-pdf:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "close-pdf": {
      "limits": [
        {
          "counter": "close-pdf_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

close-pdf gets a rate cap, and everything else on the server is denied unless you say otherwise.

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

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

Other 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.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about close-pdf

What does the close-pdf tool do? +

Close an open PDF file. It is categorised as a Other tool in the Mcp Pdf Reader MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on close-pdf? +

Register the Mcp Pdf Reader MCP server in PolicyLayer and add a rule for close-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 Reader. Nothing to install.

What risk level is close-pdf? +

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

Can I rate-limit close-pdf? +

Yes. Add a rate_limit block to the close-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 close-pdf completely? +

Set action: deny in the PolicyLayer policy for close-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 close-pdf? +

close-pdf is provided by the Mcp Pdf Reader MCP server (pietermyb/mcp-pdf-reader). 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 Reader tool call.

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

CHECK YOUR STACK →