create_sphere

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/create-sphere.md

WHAT IT DOES

What create_sphere does on FreeCAD Robust MCP Server

AI agents use create_sphere 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 create_sphere is rated Medium

The tool creates a new 3D geometric object (sphere) in the FreeCAD model, which is a reversible write operation. This is not destructive (can be undone), not financial, and not arbitrary code execution—it's a bounded modeling primitive. Severity is medium because misuse could waste computational resources or pollute models with unwanted geometry, but the impact is limited to a single workspace and easily reverted.

From the tool's definition Tool name is 'create_sphere' with empty description. Context from sibling tools (add_sketch_arc, add_sketch_circle, etc.) shows this server enables 3D modeling operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_sphere 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 create_sphere, this is the rule to start with:

create_sphere Rate-limited

create_sphere 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": {
    "create_sphere": {
      "limits": [
        {
          "counter": "create_sphere_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 create_sphere call is checked against it from then on.

FAQ

Questions about create_sphere

What does the create_sphere tool do? +

create_sphere 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 create_sphere? +

Register the FreeCAD Robust MCP Server MCP server in PolicyLayer and add a rule for create_sphere: 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 create_sphere? +

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

Can I rate-limit create_sphere? +

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

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

create_sphere 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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