set_pdf_metadata · PDF Reader MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_pdf_metadata does on PDF Reader MCP Server

AI agents use set_pdf_metadata to create or update resources in PDF Reader MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PDF Reader MCP Server environment.

WHY IT NEEDS A POLICY

Why set_pdf_metadata needs a policy

The tool modifies metadata fields in PDF documents, which is a reversible write operation. While the description is empty, the tool name and server context clearly indicate it creates or updates metadata without deleting data or executing arbitrary code.

From the tool's definition Tool name 'set_pdf_metadata' indicates modification of PDF metadata. Sibling tools on this server include 'get_pdf_metadata' (read operation) and 'extract_pdf_images', 'merge_pdfs' (write operations), establishing context that this tool modifies document…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_pdf_metadata Rate-limited

set_pdf_metadata 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": {
    "set_pdf_metadata": {
      "limits": [
        {
          "counter": "set_pdf_metadata_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about set_pdf_metadata

What does the set_pdf_metadata tool do? +

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

How do I enforce a policy on set_pdf_metadata? +

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

What risk level is set_pdf_metadata? +

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

Can I rate-limit set_pdf_metadata? +

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

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

set_pdf_metadata is provided by the PDF Reader MCP Server MCP server (lihongwen/pdfreadermcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.