vba_custom_properties · Solidworks MCP: Risk & Policy

WHAT IT DOES

What vba_custom_properties does on Solidworks

AI agents invoke vba_custom_properties to trigger actions in Solidworks. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why vba_custom_properties needs a policy

VBA (Visual Basic for Applications) generation for managing custom properties implies running macro/script code inside SolidWorks. Even if the tool only generates VBA code without directly executing it, VBA execution in CAD environments can modify documents, trigger operations, and cause unintended side effects. The 'managing' aspect also implies write operations.

From the tool's definition 'Generate VBA for managing custom properties' — generates and likely executes VBA code within SolidWorks

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vba_custom_properties Rate-limited

vba_custom_properties stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "vba_custom_properties": {
      "limits": [
        {
          "counter": "vba_custom_properties_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 vba_custom_properties

What does the vba_custom_properties tool do? +

Generate VBA for managing custom properties. It is categorised as a Execute tool in the Solidworks MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vba_custom_properties? +

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

vba_custom_properties is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit vba_custom_properties? +

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

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

vba_custom_properties 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.