High Risk →

recompute_document

Recompute a FreeCAD document to update all dependent objects. Args: doc_name: Name of document to recompute. Uses active document if None. Returns: Dictionary with recompute result: - success: Whether recompute was successful

How to control recompute_document ↓

AI agents invoke recompute_document to trigger actions in FreeCAD Robust MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

High Risk

Recomputing a document triggers an update/recalculation operation across all dependent objects in the 3D model. This is an execution action that processes and transforms data rather than simply reading or writing discrete data. It can have cascading effects on the document state, but is not inherently destructive or financial.

From the tool's definition Recompute a FreeCAD document to update all dependent objects

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

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

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "recompute_document": {
      "limits": [
        {
          "counter": "recompute_document_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

recompute_document stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

  1. Create a free account and register FreeCAD Robust MCP Server — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Go deeper

What does the recompute_document tool do? +

Recompute a FreeCAD document to update all dependent objects. Args: doc_name: Name of document to recompute. Uses active document if None. Returns: Dictionary with recompute result: - success: Whether recompute was successful. It is categorised as a Execute tool in the FreeCAD Robust MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on recompute_document? +

Register the FreeCAD Robust MCP Server MCP server in PolicyLayer and add a rule for recompute_document: 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 Robust MCP Server. Nothing to install.

What risk level is recompute_document? +

recompute_document is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit recompute_document? +

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

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

recompute_document is provided by the FreeCAD Robust MCP Server MCP server (spkane/freecad-addon-robust-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every FreeCAD Robust MCP Server tool call.

Deterministic rules across all 152 FreeCAD Robust MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

Free to start. No card required.

152 FreeCAD Robust MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

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