kunobi_call · Kunobi MCP Server MCP: Risk & Policy

WHAT IT DOES

What kunobi_call does on Kunobi MCP Server

AI agents invoke kunobi_call to trigger actions in Kunobi 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 kunobi_call needs a policy

This tool acts as a meta-executor that dispatches calls to other tools by name with arbitrary arguments. Since it can invoke any tool on the Kunobi server (including data-modifying or execution operations like query_store), the most severe applicable category is Execute.

From the tool's definition 'Stable tool entrypoint for Kunobi operations. Call a variant tool via (variant, tool, arguments)' — this is a generic dispatcher that can invoke arbitrary tools including query_store and app_info

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

kunobi_call Rate-limited

kunobi_call 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": {
    "kunobi_call": {
      "limits": [
        {
          "counter": "kunobi_call_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 Kunobi MCP Server, so you can run agents against it safely.

FAQ

Questions about kunobi_call

What does the kunobi_call tool do? +

Stable tool entrypoint for Kunobi operations. Call a variant tool via (variant, tool, arguments), e.g. variant=. It is categorised as a Execute tool in the Kunobi 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 kunobi_call? +

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

What risk level is kunobi_call? +

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

Can I rate-limit kunobi_call? +

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

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

kunobi_call is provided by the Kunobi MCP Server MCP server (kunobi-ninja/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.