crear_grupo · Moodle MCP: Risk & Policy

WHAT IT DOES

What crear_grupo does on Moodle

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

WHY IT NEEDS A POLICY

Why crear_grupo needs a policy

This tool creates a new group within a Moodle course, which is a reversible data modification operation. It falls under Write rather than Execute because it directly creates a structured entity (a group) without executing arbitrary code. While group creation modifies course organization, it is non-destructive and the effects are straightforward and reversible (groups can be deleted).

From the tool's definition Tool name 'crear_grupo' means 'create group'; description states 'Create a group inside a course', which is a creation operation that modifies course structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

crear_grupo Rate-limited

crear_grupo 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_grupo": {
      "limits": [
        {
          "counter": "crear_grupo_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 Moodle, so you can run agents against it safely.

FAQ

Questions about crear_grupo

What does the crear_grupo tool do? +

Create a group inside a course. Use asignar_a_grupo to populate it after. It is categorised as a Write tool in the Moodle 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_grupo? +

Register the Moodle MCP server in PolicyLayer and add a rule for crear_grupo: 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 Moodle. Nothing to install.

What risk level is crear_grupo? +

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

Can I rate-limit crear_grupo? +

Yes. Add a rate_limit block to the crear_grupo 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_grupo completely? +

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

crear_grupo is provided by the Moodle MCP server (marcosnahuel/moodle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.