AI agents call list_stylegrounds to retrieve information from Loenn without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name 'list_stylegrounds' suggests querying or enumerating stylegrounds from a Celeste map file. This is a passive read operation with no modification, deletion, or execution of code. Even without a description, the 'list' verb strongly indicates data retrieval with no side effects.
From the tool's definition Tool name 'list_stylegrounds' with the verb 'list' indicates data retrieval. No description provided, but 'list' is a standard retrieval operation consistent with the Read category based on the pattern of similar tools on this server (e.g.,…
Attacks that exploit this kind of access
list_stylegrounds. It is categorised as a Read tool in the Loenn MCP Server, which means it retrieves data without modifying state.
Register the Loenn MCP server in PolicyLayer and add a rule for list_stylegrounds: 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 Loenn. Nothing to install.
list_stylegrounds 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 list_stylegrounds 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 list_stylegrounds. 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.
list_stylegrounds is provided by the Loenn MCP server (magedeline/loenn-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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