scope_set_math · LeCroy Oscilloscope MCP: Risk & Policy

WHAT IT DOES

What scope_set_math does on LeCroy Oscilloscope MCP

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

WHY IT NEEDS A POLICY

Why scope_set_math needs a policy

Based on context from the server's purpose (remote control via SCPI commands) and sibling tools like 'scope_configure_channel' and 'scope_configure_trigger', this tool likely modifies mathematical operations or derived channel settings on the oscilloscope. This is reversible configuration (Write category) rather than destructive.

From the tool's definition Tool name 'scope_set_math' on an oscilloscope control server that sends SCPI commands over LAN. The 'set_' prefix indicates modification of oscilloscope settings. Description is empty, limiting direct evidence.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scope_set_math Rate-limited

scope_set_math 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": {
    "scope_set_math": {
      "limits": [
        {
          "counter": "scope_set_math_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches LeCroy Oscilloscope MCP, so you can run agents against it safely.

FAQ

Questions about scope_set_math

What does the scope_set_math tool do? +

scope_set_math. It is categorised as a Write tool in the LeCroy Oscilloscope 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 scope_set_math? +

Register the LeCroy Oscilloscope MCP server in PolicyLayer and add a rule for scope_set_math: 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 LeCroy Oscilloscope MCP. Nothing to install.

What risk level is scope_set_math? +

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

Can I rate-limit scope_set_math? +

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

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

scope_set_math is provided by the LeCroy Oscilloscope MCP server (lucasgerads/lecroy-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.