sketch_mirror · Solidworks MCP: Risk & Policy

WHAT IT DOES

What sketch_mirror does on Solidworks

AI agents use sketch_mirror 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_mirror needs a policy

The tool creates or modifies sketch entities (the mirrored geometry) within a SolidWorks design without permanently deleting data or executing arbitrary code. This is a Write-category operation—it changes the design state reversibly. Severity is medium because incorrect mirroring could compromise design intent, but the operation can be undone via undo functionality typical in CAD software.

From the tool's definition Tool name 'sketch_mirror' combined with description 'Mirror sketch entities about a line' indicates the tool modifies sketch geometry by creating mirrored copies of entities. This is a reversible modification operation on design data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sketch_mirror Rate-limited

sketch_mirror 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_mirror": {
      "limits": [
        {
          "counter": "sketch_mirror_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_mirror

What does the sketch_mirror tool do? +

Mirror sketch entities about a line. 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_mirror? +

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

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

Can I rate-limit sketch_mirror? +

Yes. Add a rate_limit block to the sketch_mirror 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_mirror completely? +

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

sketch_mirror 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.