pdf_add_annotations_images_fields

THE RISK

Medium Risk

Why pdf_add_annotations_images_fields needs a policy

The tool adds annotations, images, and fields to PDFs, which are reversible modifications to document content. This is a Write operation rather than Read (no retrieval-only), Execute (not arbitrary code/commands), or Destructive (changes are not permanent/irreversible). Severity is medium because misuse could modify important PDF documents, but changes can typically be undone.

From the tool's definition Tool name 'pdf_add_annotations_images_fields' indicates creation/modification of PDF content through annotation and field addition.

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

POLICY

How to control pdf_add_annotations_images_fields

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

policy.json

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

pdf_add_annotations_images_fields 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 PDF Co 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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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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 →
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FAQ

Questions about pdf_add_annotations_images_fields

What does the pdf_add_annotations_images_fields tool do? +

pdf_add_annotations_images_fields. It is categorised as a Write tool in the PDF Co 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 pdf_add_annotations_images_fields? +

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

What risk level is pdf_add_annotations_images_fields? +

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

Can I rate-limit pdf_add_annotations_images_fields? +

Yes. Add a rate_limit block to the pdf_add_annotations_images_fields 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_add_annotations_images_fields completely? +

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

pdf_add_annotations_images_fields is provided by the PDF Co MCP Server MCP server (pdfdotco/pdfco-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every PDF Co MCP Server tool call.

Start from PDF Co 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 →