sketch_line · Solidworks MCP: Risk & Policy

WHAT IT DOES

What sketch_line does on Solidworks

AI agents use sketch_line 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 sketch_line needs a policy

This tool creates/modifies CAD sketch data by adding a line entity to the active sketch. It is a reversible write operation (the line can be deleted), with medium severity since misuse could corrupt a design file but does not delete data or trigger irreversible actions.

From the tool's definition "Draw a line in the active sketch" — creates new geometry in an existing sketch

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sketch_line Rate-limited

sketch_line 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": {
    "sketch_line": {
      "limits": [
        {
          "counter": "sketch_line_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 sketch_line

What does the sketch_line tool do? +

Draw a line in the active sketch. 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 sketch_line? +

Register the Solidworks MCP server in PolicyLayer and add a rule for sketch_line: 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 sketch_line? +

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

Can I rate-limit sketch_line? +

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

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

sketch_line 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.