List all light actors in the level with their types and properties.
AI agents call light_list to retrieve information from Uefn without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about existing light actors in an Unreal Editor level. It performs a read-only operation that queries and returns data without modifying, deleting, or executing any changes to the level state. The verb 'list' is characteristic of Read category tools. No irreversible actions, code execution, or data modification occurs.
From the tool's definition Tool name 'light_list' and description 'List all light actors in the level with their types and properties' indicate a query/retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access light_list gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Uefn, and nothing reaches the server without passing your rules. This is the rule we recommend for light_list:
{
"version": "1",
"default": "deny",
"tools": {
"light_list": {}
}
}light_list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all light actors in the level with their types and properties. It is categorised as a Read tool in the Uefn MCP Server, which means it retrieves data without modifying state.
Register the Uefn MCP server in PolicyLayer and add a rule for light_list: 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 Uefn. Nothing to install.
light_list 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 light_list 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 light_list. 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.
light_list is provided by the Uefn MCP server (quangdang46/uefn-verse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Uefn, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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143 Uefn tools catalogued and risk-classified — across an index of 43,000+ MCP servers.