virtuoso_connect · Virtuoso Schematic MCP: Risk & Policy

WHAT IT DOES

What virtuoso_connect does on Virtuoso Schematic MCP

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

WHY IT NEEDS A POLICY

Why virtuoso_connect needs a policy

An AI agent can call virtuoso_connect faster than any human can review — one bad instruction and it creates or modifies resources in Virtuoso Schematic MCP by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

virtuoso_connect Rate-limited

virtuoso_connect 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": {
    "virtuoso_connect": {
      "limits": [
        {
          "counter": "virtuoso_connect_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 Virtuoso Schematic MCP, so you can run agents against it safely.

FAQ

Questions about virtuoso_connect

What does the virtuoso_connect tool do? +

Connect (or reconnect) to a running Cadence Virtuoso session via SkillBridge. It is categorised as a Write tool in the Virtuoso Schematic MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on virtuoso_connect? +

Register the Virtuoso Schematic MCP server in PolicyLayer and add a rule for virtuoso_connect: 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 Virtuoso Schematic MCP. Nothing to install.

What risk level is virtuoso_connect? +

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

Can I rate-limit virtuoso_connect? +

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

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

virtuoso_connect is provided by the Virtuoso Schematic MCP server (michelebergo/virtuoso-schematic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.