list_documents

THE RISK

Low Risk

Why list_documents needs a policy

This tool only retrieves information about currently open documents without modifying, deleting, executing, or creating any data. It is a read-only operation with minimal security risk.

From the tool's definition Tool name is 'list_documents' and description states it 'Get the list of open documents in FreeCAD' and 'Returns: A list of document names.' This is a pure query operation with no side effects.

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

POLICY

How to control list_documents

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_documents": {}
  }
}

list_documents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Freecad mcp — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_documents

What does the list_documents tool do? +

Get the list of open documents in FreeCAD. Returns: A list of document names. It is categorised as a Read tool in the Freecad mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_documents? +

Register the Freecad MCP server in PolicyLayer and add a rule for list_documents: 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 Freecad mcp. Nothing to install.

What risk level is list_documents? +

list_documents is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_documents? +

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

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

list_documents is provided by the Freecad MCP server (neka-nat/freecad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Freecad mcp tool call.

Start from Freecad mcp, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →