create_sketch · Solidworks MCP: Risk & Policy

WHAT IT DOES

What create_sketch does on Solidworks

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

WHY IT NEEDS A POLICY

Why create_sketch needs a policy

The tool creates new geometry (a sketch) in the SolidWorks model, which is a reversible write operation. While sketches are fundamental to CAD design, creating them modifies the model structure and can affect downstream operations. This is more severe than a simple read (which would just query existing data) but less severe than destructive operations (delete, purge) or financial transactions.

From the tool's definition Tool creates a new sketch on a specified plane or face; this is a reversible creation operation that modifies the CAD model state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_sketch Rate-limited

create_sketch 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_sketch": {
      "limits": [
        {
          "counter": "create_sketch_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 Solidworks, so you can run agents against it safely.

FAQ

Questions about create_sketch

What does the create_sketch tool do? +

Create a new sketch on a specified plane or face. It is categorised as a Write tool in the Solidworks 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_sketch? +

Register the Solidworks MCP server in PolicyLayer and add a rule for create_sketch: 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 Solidworks. Nothing to install.

What risk level is create_sketch? +

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

Can I rate-limit create_sketch? +

Yes. Add a rate_limit block to the create_sketch 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_sketch completely? +

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

create_sketch is provided by the Solidworks MCP server (solidworks-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.