constrain_distance

A write tool on the FreeCAD Robust MCP server.

SERVERFreeCAD Robust MCP Server SOURCEspkane/freecad-addon-robust-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/spkane-freecad-addon-robust-mcp-server/constrain-distance.md

WHAT IT DOES

What constrain_distance does on FreeCAD Robust MCP Server

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

RISK

Why constrain_distance is rated Medium

Based on the tool name and context of sibling tools (add_sketch_constraint, add_sketch_line, etc.), this tool likely adds or modifies a distance constraint in a FreeCAD sketch, which is a reversible write operation. No description is provided, lowering confidence. Severity is medium as misuse could corrupt a 3D model design.

From the tool's definition Tool name 'constrain_distance' suggests applying a distance constraint to sketch geometry in FreeCAD; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs constrain_distance safely

PolicyLayer is an MCP gateway: it sits between your AI agents and FreeCAD Robust MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For constrain_distance, this is the rule to start with:

constrain_distance Rate-limited

constrain_distance 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": {
    "constrain_distance": {
      "limits": [
        {
          "counter": "constrain_distance_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect FreeCAD Robust MCP Server, apply this rule, and every constrain_distance call is checked against it from then on.

FAQ

Questions about constrain_distance

What does the constrain_distance tool do? +

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

How do I enforce a policy on constrain_distance? +

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

What risk level is constrain_distance? +

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

Can I rate-limit constrain_distance? +

Yes. Add a rate_limit block to the constrain_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 constrain_distance completely? +

Set action: deny in the PolicyLayer policy for constrain_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 constrain_distance? +

constrain_distance 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.

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