create_microservice · API Creator MCP: Risk & Policy

WHAT IT DOES

What create_microservice does on API Creator MCP

AI agents use create_microservice to create or update resources in API Creator MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your API Creator MCP environment.

WHY IT NEEDS A POLICY

Why create_microservice needs a policy

This tool creates a new microservice, which is a Write operation (creating new artifacts/configurations). It generates production-ready code and deployment configurations, which could have significant blast radius if misconfigured — introducing insecure services, improper service discovery, or flawed async communication patterns into an infrastructure.

From the tool's definition "Generate a microservice with async communication, service discovery, and observability"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_microservice Rate-limited

create_microservice stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_microservice": {
      "limits": [
        {
          "counter": "create_microservice_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about create_microservice

What does the create_microservice tool do? +

Generate a microservice with async communication, service discovery, and observability. It is categorised as a Write tool in the API Creator MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_microservice? +

Register the API Creator MCP server in PolicyLayer and add a rule for create_microservice: 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 API Creator MCP. Nothing to install.

What risk level is create_microservice? +

create_microservice is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_microservice? +

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

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

create_microservice is provided by the API Creator MCP server (tolkyo/api-creator-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.