cnv_score · Infercnv- MCP: Risk & Policy

WHAT IT DOES

What cnv_score does on Infercnv-MCP

AI agents invoke cnv_score to trigger actions in Infercnv-MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why cnv_score needs a policy

This tool performs a computational operation (calculating CNV scores) on single-cell RNA sequencing data. It executes an analysis pipeline that processes data and produces derived metrics, rather than simply reading existing data or writing user-provided content. The operation triggers computation whose effects depend on the input data.

From the tool's definition Calculate CNV scores for each cell

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cnv_score Rate-limited

cnv_score stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cnv_score": {
      "limits": [
        {
          "counter": "cnv_score_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Infercnv-MCP, so you can run agents against it safely.

FAQ

Questions about cnv_score

What does the cnv_score tool do? +

Calculate CNV scores for each cell. It is categorised as a Execute tool in the Infercnv-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on cnv_score? +

Register the Infercnv- MCP server in PolicyLayer and add a rule for cnv_score: 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 Infercnv-MCP. Nothing to install.

What risk level is cnv_score? +

cnv_score is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit cnv_score? +

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

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

cnv_score is provided by the Infercnv- MCP server (scmcphub/infercnv-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.