scope_capture · Oscilloscope MCP: Risk & Policy

WHAT IT DOES

What scope_capture does on Oscilloscope

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

WHY IT NEEDS A POLICY

Why scope_capture needs a policy

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

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scope_capture Rate-limited

scope_capture 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_capture": {
      "limits": [
        {
          "counter": "scope_capture_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 Oscilloscope, so you can run agents against it safely.

FAQ

Questions about scope_capture

What does the scope_capture tool do? +

scope_capture. It is categorised as a Write tool in the Oscilloscope 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_capture? +

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

What risk level is scope_capture? +

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

Can I rate-limit scope_capture? +

Yes. Add a rate_limit block to the scope_capture 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_capture completely? +

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

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