add_site

SERVERMoodle SOURCE@falkenslab/moodle-mcp

Medium RISK CLASS

Category Write

Parameters 20 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/falkenslab-moodle-mcp/add-site.md

WHAT IT DOES

What add_site does on Moodle

AI agents use add_site 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.

Parameter	Type	Required	Description
`url`	string	—	The site's URL, or any page of it; without it, the person is asked in their app when it can
`name`	string	—	A short name for it; its host by default

Parameters from the server's own tool schema.

RISK

Why add_site is rated Medium

An AI agent can call add_site faster than any human can review: one bad instruction and it creates or modifies resources in Moodle by the hundred, each call as confident as the last.

Risk signalsAccepts URL/endpoint input (url)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_site safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Moodle, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_site, this is the rule to start with:

add_site Rate-limited

add_site 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": {
    "add_site": {
      "limits": [
        {
          "counter": "add_site_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Moodle, apply this rule, and every add_site call is checked against it from then on.

FAQ

Questions about add_site

What does the add_site tool do? +

Add a Moodle site to this server, kept for later sessions: its URL (any page of it works) and, optionally, a short name (letters, digits, dots, hyphens; its host by default). Without url, the person is asked for both in their app, where the client can ask them (MCP elicitation); else ask them yourself. Two accounts on one site are two sites: add the second with a name of its own. It doesn't become active: switch to it with use_site, and log in there when a tool asks. Only when the person asks for another site. 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.

What parameters does add_site accept? +

add_site accepts 2 parameters: url, name. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on add_site? +

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

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

Can I rate-limit add_site? +

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

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

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

KEEP EXPLORING

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All 233 Moodle tools →

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add-tag on Kanban MCP Server →kb_add on Persistent Kb → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →