scope_store_waveform · LeCroy Oscilloscope MCP

WHAT IT DOES

What scope_store_waveform does on LeCroy Oscilloscope MCP

AI agents use scope_store_waveform 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_store_waveform needs a policy

The tool stores waveform data to internal memory, which is a write operation (creates or modifies data). It is not destructive since waveforms can typically be overwritten or deleted separately. It does not execute arbitrary code, delete data, or move money. The scope is limited to a single oscilloscope device, making the blast radius low if misused by an AI agent.

From the tool's definition Tool description states 'Store a waveform to internal memory' — this creates or modifies data in the oscilloscope's storage without irreversibly destroying existing data. The verb 'store' indicates a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scope_store_waveform Rate-limited

scope_store_waveform 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_store_waveform": {
      "limits": [
        {
          "counter": "scope_store_waveform_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 LeCroy Oscilloscope MCP, so you can run agents against it safely.

FAQ

Questions about scope_store_waveform

What does the scope_store_waveform tool do? +

Store a waveform to internal memory. 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_store_waveform? +

Register the LeCroy Oscilloscope MCP server in PolicyLayer and add a rule for scope_store_waveform: 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_store_waveform? +

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

Can I rate-limit scope_store_waveform? +

Yes. Add a rate_limit block to the scope_store_waveform 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_store_waveform completely? +

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

scope_store_waveform 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.