pdf_merge · Mcp Pdf Utils MCP: Risk & Policy

WHAT IT DOES

What pdf_merge does on Mcp Pdf Utils

AI agents use pdf_merge to create or update resources in Mcp Pdf Utils — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Pdf Utils environment.

WHY IT NEEDS A POLICY

Why pdf_merge needs a policy

pdf_merge creates or modifies files by combining inputs into a new PDF output. This is a Write operation because it produces new data in a reversible manner. It does not irreversibly delete data (ruling out Destructive), does not execute arbitrary code (ruling out Execute), and does not move money (ruling out Financial).

From the tool's definition Tool description states 'Merge multiple PDF files into a single PDF' — this combines existing PDFs into a new output file, modifying or creating data. The server description notes it handles 'merging' as a core capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pdf_merge Rate-limited

pdf_merge 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.

View as policy code

policy.json

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

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Pdf Utils, so you can run agents against it safely.

FAQ

Questions about pdf_merge

What does the pdf_merge tool do? +

Merge multiple PDF files into a single PDF. It is categorised as a Write tool in the Mcp Pdf Utils MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pdf_merge? +

Register the Mcp Pdf Utils MCP server in PolicyLayer and add a rule for pdf_merge: 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 Utils. Nothing to install.

What risk level is pdf_merge? +

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

Can I rate-limit pdf_merge? +

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

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

pdf_merge is provided by the Mcp Pdf Utils MCP server (zekovdev/mcp-pdf-utils). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.