AI agents call grades to retrieve information from Moodle Connector without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves grade information from Moodle without creating, modifying, deleting, or executing any operations. It is purely informational in nature. The low severity reflects minimal risk—exposing grade data to an AI agent carries educational privacy concerns but no technical blast radius (no account changes, financial impact, or destructive operations).
From the tool's definition Tool name 'grades' with description 'Get grades overview or per-course grades' indicates data retrieval only. Verbs 'Get' explicitly signals read-only querying without modification or side effects.
Documented attack patterns abuse exactly the kind of access grades gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Moodle Connector, and nothing reaches the server without passing your rules. This is the rule we recommend for grades:
{
"version": "1",
"default": "deny",
"tools": {
"grades": {}
}
}grades is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get grades overview or per-course grades. It is categorised as a Read tool in the Moodle Connector MCP Server, which means it retrieves data without modifying state.
Register the Moodle Connector MCP server in PolicyLayer and add a rule for grades: 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 Connector. Nothing to install.
grades is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the grades 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.
Set action: deny in the PolicyLayer policy for grades. 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.
grades is provided by the Moodle Connector MCP server (jabir-srj/moodle-connector). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Moodle Connector, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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8 Moodle Connector tools catalogued and risk-classified — across an index of 43,000+ MCP servers.