pc_algorithm · DoWhy MCP v2 0 MCP: Risk & Policy

WHAT IT DOES

What pc_algorithm does on DoWhy MCP v2 0

AI agents invoke pc_algorithm to trigger actions in DoWhy MCP v2 0. 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 pc_algorithm needs a policy

The tool executes the PC (Peter-Clark) causal discovery algorithm, which runs a computational process over provided data to infer causal structure. This is an Execute-category action as it triggers an external algorithm/operation whose effects depend on the input data and parameters. It does not read pre-existing stored data, write persistent records, or perform destructive/financial actions.

From the tool's definition '运行 PC 算法进行因果发现' (run PC algorithm for causal discovery) — triggers an external computational algorithm using causal-learn and DoWhy libraries

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pc_algorithm Rate-limited

pc_algorithm 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": {
    "pc_algorithm": {
      "limits": [
        {
          "counter": "pc_algorithm_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 DoWhy MCP v2 0, so you can run agents against it safely.

FAQ

Questions about pc_algorithm

What does the pc_algorithm tool do? +

使用 DoWhy 和 causal-learn 运行 PC 算法进行因果发现. It is categorised as a Execute tool in the DoWhy MCP v2 0 MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on pc_algorithm? +

Register the DoWhy MCP v2 0 MCP server in PolicyLayer and add a rule for pc_algorithm: 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 DoWhy MCP v2 0. Nothing to install.

What risk level is pc_algorithm? +

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

Can I rate-limit pc_algorithm? +

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

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

pc_algorithm is provided by the DoWhy MCP v2 0 MCP server (lesong36/dowhy_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.