AI agents call announcements 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 course announcements, which is a read-only operation that queries existing data without creating, modifying, deleting, or executing any operations. The verb 'Get' confirms it is a simple retrieval function with no capability to alter state. Severity is low as unauthorized access to announcements poses minimal risk compared to other Moodle operations like grade modification or assignment deletion.
From the tool's definition Tool name 'announcements' with description 'Get course announcements' indicates data retrieval with no modification or side effects.
Documented attack patterns abuse exactly the kind of access announcements 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 announcements:
{
"version": "1",
"default": "deny",
"tools": {
"announcements": {}
}
}announcements is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get course announcements. 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 announcements: 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.
announcements 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 announcements 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 announcements. 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.
announcements 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.