create_manhattan_plot · Gwas MCP: Risk & Policy

WHAT IT DOES

What create_manhattan_plot does on Gwas

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

WHY IT NEEDS A POLICY

Why create_manhattan_plot needs a policy

The tool produces a new plot/visualization output from input GWAS summary statistics. While it processes existing data, the output is a newly generated visual artifact (a plot file or image). This is a Write operation—reversible data creation with no side effects on source data or external systems.

From the tool's definition Tool creates a visualization ('create_manhattan_plot') that generates and outputs a Manhattan plot as a data artifact. This is a data creation action.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_manhattan_plot Rate-limited

create_manhattan_plot 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": {
    "create_manhattan_plot": {
      "limits": [
        {
          "counter": "create_manhattan_plot_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 Gwas, so you can run agents against it safely.

FAQ

Questions about create_manhattan_plot

What does the create_manhattan_plot tool do? +

Create a Manhattan plot from GWAS summary statistics. Shows -log10(p-value) across chromosomes. It is categorised as a Write tool in the Gwas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_manhattan_plot? +

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

What risk level is create_manhattan_plot? +

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

Can I rate-limit create_manhattan_plot? +

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

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

create_manhattan_plot is provided by the Gwas MCP server (muslus/gwas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.