AI agents call listar_badges_usuario to retrieve information from Moodle without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns badge data for a user, optionally filtered by course. The description explicitly states 'Read-only', confirming no state changes, reversible modifications, code execution, deletions, or financial operations occur. The blast radius of misuse is minimal—an agent could only retrieve badge information already associated with the user.
From the tool's definition 'List badges earned by a user' and 'Read-only' explicitly indicate retrieval without modification or side effects.
Attacks that exploit this kind of access
List badges earned by a user. Optionally filtered by course_id. Read-only — awarding badges is deferred to v0.6. It is categorised as a Read tool in the Moodle MCP Server, which means it retrieves data without modifying state.
Register the Moodle MCP server in PolicyLayer and add a rule for listar_badges_usuario: 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.
listar_badges_usuario 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 listar_badges_usuario 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 listar_badges_usuario. 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.
listar_badges_usuario 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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