connect · Siglent Sds MCP: Risk & Policy

WHAT IT DOES

What connect does on Siglent Sds

AI agents invoke connect to trigger actions in Siglent Sds. 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 connect needs a policy

This tool establishes a TCP network connection to an external physical device (oscilloscope). It triggers an external operation with real-world side effects (network connection, device state change), placing it in the Execute category. Misuse could disrupt lab equipment or enable unauthorized device access, giving it medium severity.

From the tool's definition Connect to a Siglent oscilloscope over TCP

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

connect Rate-limited

connect 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": {
    "connect": {
      "limits": [
        {
          "counter": "connect_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 Siglent Sds, so you can run agents against it safely.

FAQ

Questions about connect

What does the connect tool do? +

Connect to a Siglent oscilloscope over TCP. Returns device identification on success. It is categorised as a Execute tool in the Siglent Sds MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on connect? +

Register the Siglent Sds MCP server in PolicyLayer and add a rule for 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 Siglent Sds. Nothing to install.

What risk level is connect? +

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

Can I rate-limit connect? +

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

Set action: deny in the PolicyLayer policy for 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 connect? +

connect is provided by the Siglent Sds MCP server (magnusjohansson/siglent-sds-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.