plot_violin · ML Research MCP: Risk & Policy

WHAT IT DOES

What plot_violin does on ML Research MCP

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

WHY IT NEEDS A POLICY

Why plot_violin needs a policy

Based on the server context and sibling tools (plot_bar, plot_box, plot_scatter, etc.), this tool almost certainly generates a violin plot visualization — a statistical chart showing data distribution. This is a Write operation as it creates/renders a file or output artifact. No code execution, deletion, or financial action is implied. Confidence is reduced due to the empty description.

From the tool's definition Tool name 'plot_violin' on a server described as providing 'publication-quality scientific visualizations, statistical plots, and 2D data representations'; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

plot_violin Rate-limited

plot_violin 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_violin": {
      "limits": [
        {
          "counter": "plot_violin_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 ML Research MCP, so you can run agents against it safely.

FAQ

Questions about plot_violin

What does the plot_violin tool do? +

plot_violin. It is categorised as a Write tool in the ML Research 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 plot_violin? +

Register the ML Research MCP server in PolicyLayer and add a rule for plot_violin: 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 ML Research MCP. Nothing to install.

What risk level is plot_violin? +

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

Can I rate-limit plot_violin? +

Yes. Add a rate_limit block to the plot_violin 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_violin completely? +

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

plot_violin is provided by the ML Research MCP server (nishide-dev/ml-research-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.