asignar_a_grupo · Moodle MCP: Risk & Policy

WHAT IT DOES

What asignar_a_grupo does on Moodle

AI agents use asignar_a_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 asignar_a_grupo needs a policy

This tool creates or modifies user-group associations in the Moodle learning management system. It is reversible (users can be removed from groups later) and has a moderate blast radius if misused — an agent could accidentally assign large cohorts to wrong groups, disrupting course organization and access control.

From the tool's definition Tool name 'asignar_a_grupo' means 'assign to group'; description states 'Add one or more users to a group' — this is a create/modify operation that changes group membership in Moodle.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

asignar_a_grupo Rate-limited

asignar_a_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": {
    "asignar_a_grupo": {
      "limits": [
        {
          "counter": "asignar_a_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 asignar_a_grupo

What does the asignar_a_grupo tool do? +

Add one or more users to a group by group_id. 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 asignar_a_grupo? +

Register the Moodle MCP server in PolicyLayer and add a rule for asignar_a_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 asignar_a_grupo? +

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

Can I rate-limit asignar_a_grupo? +

Yes. Add a rate_limit block to the asignar_a_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 asignar_a_grupo completely? +

Set action: deny in the PolicyLayer policy for asignar_a_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 asignar_a_grupo? +

asignar_a_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.