confirmar_preview · Moodle MCP: Risk & Policy

WHAT IT DOES

What confirmar_preview does on Moodle

AI agents use confirmar_preview 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 confirmar_preview needs a policy

This tool creates or modifies data reversibly by changing visibility settings of course sections and their modules. While it affects student access to content, the operation is reversible (sections can be hidden again), placing it in the Write category rather than Execute or Destructive.

From the tool's definition Tool description states it makes a previewed section 'visible to students' and 'propagates visibility to all modules inside the section.' This is a modification operation that changes the state of educational content from hidden/preview status to…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

confirmar_preview Rate-limited

confirmar_preview 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": {
    "confirmar_preview": {
      "limits": [
        {
          "counter": "confirmar_preview_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 confirmar_preview

What does the confirmar_preview tool do? +

Make a previewed section visible to students. Propagates visibility to all modules inside the section. Idempotent. 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 confirmar_preview? +

Register the Moodle MCP server in PolicyLayer and add a rule for confirmar_preview: 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 confirmar_preview? +

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

Can I rate-limit confirmar_preview? +

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

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

confirmar_preview 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.