close_model · Solidworks MCP: Risk & Policy

WHAT IT DOES

What close_model does on Solidworks

AI agents use close_model 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 close_model needs a policy

This tool performs a reversible write operation (closing and saving a model file). While it can trigger a save that persists data modifications, the action itself is not inherently destructive—the user retains the option to save or discard changes.

From the tool's definition Tool name 'close_model' with description 'Close the current model with option to save' indicates it modifies the state of the application by closing a document, potentially with a save operation that persists changes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

close_model Rate-limited

close_model 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": {
    "close_model": {
      "limits": [
        {
          "counter": "close_model_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 close_model

What does the close_model tool do? +

Close the current model with option to save. 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 close_model? +

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

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

Can I rate-limit close_model? +

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

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

close_model 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.