measure_distance

THE RISK

Low Risk

Why measure_distance needs a policy

This tool performs a measurement/query operation with no side effects. It reads geometric data from the CAD environment and returns a distance value without creating, modifying, or deleting any data.

From the tool's definition Measure distance between two points or objects

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

POLICY

How to control measure_distance

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

policy.json

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

measure_distance 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 Mcp Freecad — 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

More Mcp Freecad tools

Execute emit_custom_event Emit a custom event Execute freecad_boolean_cut Perform a boolean cut (difference) between two objects (object1 - object2). Execute subscribe_to_events Subscribe to FreeCAD events Write boolean_cut Perform boolean cut (subtraction) of two objects Write boolean_intersection Perform boolean intersection of two objects Write boolean_union Perform boolean union of two objects Write create_box Create a box/cube primitive in FreeCAD Write create_cone Create a cone primitive in FreeCAD

All 34 Mcp Freecad tools →

Read tools on other servers

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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 measure_distance

What does the measure_distance tool do? +

Measure distance between two points or objects. It is categorised as a Read tool in the Mcp Freecad MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on measure_distance? +

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

What risk level is measure_distance? +

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

Can I rate-limit measure_distance? +

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

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

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

Enforce policy on every Mcp Freecad tool call.

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

CHECK YOUR STACK →