plot_results · MCP Autonomous Analyst MCP: Risk & Policy

WHAT IT DOES

What plot_results does on MCP Autonomous Analyst

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

WHY IT NEEDS A POLICY

Why plot_results needs a policy

The tool creates a visualization artifact and writes it to disk. While this modifies the filesystem, it is reversible (plots can be deleted or overwritten), so it falls under Write rather than Destructive. The severity is medium because uncontrolled plot generation could consume disk space or overwrite important visualizations, but the impact is bounded and non-financial.

From the tool's definition The tool description states 'save plot', which involves creating and persisting data (the plot file) to storage. This is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

plot_results Rate-limited

plot_results 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": {
    "plot_results": {
      "limits": [
        {
          "counter": "plot_results_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 MCP Autonomous Analyst, so you can run agents against it safely.

FAQ

Questions about plot_results

What does the plot_results tool do? +

Plot inliers and outliers and save plot. It is categorised as a Write tool in the MCP Autonomous Analyst MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on plot_results? +

Register the MCP Autonomous Analyst MCP server in PolicyLayer and add a rule for plot_results: 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 MCP Autonomous Analyst. Nothing to install.

What risk level is plot_results? +

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

Can I rate-limit plot_results? +

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

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

plot_results is provided by the MCP Autonomous Analyst MCP server (madmando/mcp-autonomous-analyst). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.