hire_agent · Vending Machine MCP: Risk & Policy

WHAT IT DOES

What hire_agent does on Vending Machine

AI agents invoke hire_agent to trigger actions in Vending Machine. 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 hire_agent needs a policy

Based on the server description, hiring an agent implies triggering external agent execution or committing to an external operation. Given sibling tools like 'run', 'run_code', and 'execute_script'-like operations, this likely initiates an external agent process. Empty description lowers confidence.

From the tool's definition Tool name 'hire_agent' on a server described as a marketplace to 'hire agents, run scripts, audit code'; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

hire_agent Rate-limited

hire_agent 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": {
    "hire_agent": {
      "limits": [
        {
          "counter": "hire_agent_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 Vending Machine, so you can run agents against it safely.

FAQ

Questions about hire_agent

What does the hire_agent tool do? +

hire_agent. It is categorised as a Execute tool in the Vending Machine MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on hire_agent? +

Register the Vending Machine MCP server in PolicyLayer and add a rule for hire_agent: 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 Vending Machine. Nothing to install.

What risk level is hire_agent? +

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

Can I rate-limit hire_agent? +

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

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

hire_agent is provided by the Vending Machine MCP server (yokiidesu/vending-machine-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.