oakvar_module_install · OakVar MCP Server MCP: Risk & Policy

WHAT IT DOES

What oakvar_module_install does on OakVar MCP Server

AI agents invoke oakvar_module_install to trigger actions in OakVar MCP Server. 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 oakvar_module_install needs a policy

Installing modules downloads and executes code on the host system. While not purely destructive, it introduces new software that runs on the system, which can have broad side effects. The blast radius is high because a malicious or incorrect module installation could compromise the system's integrity or introduce malicious code.

From the tool's definition Install OakVar modules from the store

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

oakvar_module_install Rate-limited

oakvar_module_install 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": {
    "oakvar_module_install": {
      "limits": [
        {
          "counter": "oakvar_module_install_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 OakVar MCP Server, so you can run agents against it safely.

FAQ

Questions about oakvar_module_install

What does the oakvar_module_install tool do? +

Install OakVar modules from the store. It is categorised as a Execute tool in the OakVar MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on oakvar_module_install? +

Register the OakVar MCP Server MCP server in PolicyLayer and add a rule for oakvar_module_install: 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 OakVar MCP Server. Nothing to install.

What risk level is oakvar_module_install? +

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

Can I rate-limit oakvar_module_install? +

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

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

oakvar_module_install is provided by the OakVar MCP Server MCP server (miliyarsh/oakvar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.