document_convert · LibreOffice MCP Tools MCP: Risk & Policy

WHAT IT DOES

What document_convert does on LibreOffice MCP Tools

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

WHY IT NEEDS A POLICY

Why document_convert needs a policy

The tool creates new output files through document conversion, which is a reversible write operation. While it doesn't modify the original document (as explicitly stated), it generates new artifacts. This is Write rather than Read (it transforms and persists data) or Execute (conversion is a bounded operation with predictable effects).

From the tool's definition Tool description states it "Creates a new file" and supports format conversion operations like "DOC→DOCX, DOCX→PDF, XLSX→CSV". These are file creation and modification actions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

document_convert Rate-limited

document_convert 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": {
    "document_convert": {
      "limits": [
        {
          "counter": "document_convert_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 LibreOffice MCP Tools, so you can run agents against it safely.

FAQ

Questions about document_convert

What does the document_convert tool do? +

Convert a document file to a different format using LibreOffice CLI. Creates a new file; original is not modified. Useful for: DOC→DOCX, DOCX→PDF, XLSX→CSV, etc. LibreOffice must be installed. It is categorised as a Write tool in the LibreOffice MCP Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on document_convert? +

Register the LibreOffice MCP Tools MCP server in PolicyLayer and add a rule for document_convert: 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 LibreOffice MCP Tools. Nothing to install.

What risk level is document_convert? +

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

Can I rate-limit document_convert? +

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

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

document_convert is provided by the LibreOffice MCP Tools MCP server (passerbyflutter/libreoffice-mcp-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.