crear-usuario · MCP API Server MCP: Risk & Policy

WHAT IT DOES

What crear-usuario does on MCP API Server

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

WHY IT NEEDS A POLICY

Why crear-usuario needs a policy

This tool creates a new user entity in the system with personally identifiable information (name, surname, DNI). It is a Write operation as it adds new data reversibly. Medium severity because it involves PII and could be misused to create unauthorized accounts, but is not irreversible or financial.

From the tool's definition 'Crea un nuevo usuario con nombre, apellido y DNI' — creates a new user record with personal data

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

crear-usuario Rate-limited

crear-usuario 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": {
    "crear-usuario": {
      "limits": [
        {
          "counter": "crear-usuario_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 MCP API Server, so you can run agents against it safely.

FAQ

Questions about crear-usuario

What does the crear-usuario tool do? +

Crea un nuevo usuario con nombre, apellido y DNI. It is categorised as a Write tool in the MCP API Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on crear-usuario? +

Register the MCP API Server MCP server in PolicyLayer and add a rule for crear-usuario: 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 MCP API Server. Nothing to install.

What risk level is crear-usuario? +

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

Can I rate-limit crear-usuario? +

Yes. Add a rate_limit block to the crear-usuario 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 crear-usuario completely? +

Set action: deny in the PolicyLayer policy for crear-usuario. 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 crear-usuario? +

crear-usuario is provided by the MCP API Server MCP server (mcgiverdev/mcp-api-v1). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.