reopen_comment · Overleaf MCP: Risk & Policy

WHAT IT DOES

What reopen_comment does on Overleaf

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

WHY IT NEEDS A POLICY

Why reopen_comment needs a policy

Reopening a comment thread is a write operation that modifies document collaboration state. It is reversible (comments can be resolved again), so it does not qualify as Destructive.

From the tool's definition Tool description states it 'Reopens a previously-resolved thread', which modifies the state of a comment thread from resolved to open. This is a reversible state change to collaborative document metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reopen_comment Rate-limited

reopen_comment 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": {
    "reopen_comment": {
      "limits": [
        {
          "counter": "reopen_comment_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 Overleaf, so you can run agents against it safely.

FAQ

Questions about reopen_comment

What does the reopen_comment tool do? +

Reopens a previously-resolved thread. It is categorised as a Write tool in the Overleaf MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on reopen_comment? +

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

What risk level is reopen_comment? +

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

Can I rate-limit reopen_comment? +

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

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

reopen_comment is provided by the Overleaf MCP server (netique/overleaf-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.