cfd_fluidx3d_explain · FreeCAD MCP: Risk & Policy

WHAT IT DOES

What cfd_fluidx3d_explain does on FreeCAD MCP

AI agents use cfd_fluidx3d_explain to create or update resources in FreeCAD MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FreeCAD MCP environment.

WHY IT NEEDS A POLICY

Why cfd_fluidx3d_explain needs a policy

An AI agent can call cfd_fluidx3d_explain faster than any human can review — one bad instruction and it creates or modifies resources in FreeCAD MCP by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cfd_fluidx3d_explain Rate-limited

cfd_fluidx3d_explain 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": {
    "cfd_fluidx3d_explain": {
      "limits": [
        {
          "counter": "cfd_fluidx3d_explain_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 FreeCAD MCP, so you can run agents against it safely.

FAQ

Questions about cfd_fluidx3d_explain

What does the cfd_fluidx3d_explain tool do? +

cfd_fluidx3d_explain. It is categorised as a Write tool in the FreeCAD MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cfd_fluidx3d_explain? +

Register the FreeCAD MCP server in PolicyLayer and add a rule for cfd_fluidx3d_explain: 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 cfd_fluidx3d_explain? +

cfd_fluidx3d_explain is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit cfd_fluidx3d_explain? +

Yes. Add a rate_limit block to the cfd_fluidx3d_explain 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 cfd_fluidx3d_explain completely? +

Set action: deny in the PolicyLayer policy for cfd_fluidx3d_explain. 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 cfd_fluidx3d_explain? +

cfd_fluidx3d_explain is provided by the FreeCAD MCP server (sandraschi/freecad-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.