reorder_page · Pen MCP: Risk & Policy

WHAT IT DOES

What reorder_page does on Pen

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

WHY IT NEEDS A POLICY

Why reorder_page needs a policy

Reordering pages modifies document structure persistently but is a non-destructive write operation. It does not execute code, move money, or irreversibly delete data. The severity is medium because misuse could reorganize critical document sections in confusing ways, but the effect is fully reversible and does not cause permanent data loss. Confidence is high given the clear, specific description of the operation.

From the tool's definition Tool description states "Move a page to a new position (index) in an .op file" — this modifies the structure/order of document content without deleting data. The operation is reversible (can be moved again to restore original order).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reorder_page Rate-limited

reorder_page 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": {
    "reorder_page": {
      "limits": [
        {
          "counter": "reorder_page_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about reorder_page

What does the reorder_page tool do? +

Move a page to a new position (index) in an .op file. It is categorised as a Write tool in the Pen MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on reorder_page? +

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

What risk level is reorder_page? +

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

Can I rate-limit reorder_page? +

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

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

reorder_page is provided by the Pen MCP server (@zseven-w/pen-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.