AI agents call list_available_assets to retrieve information from Unreal without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves information about available assets in the Unreal Engine project. No side effects or modifications are implied by the name. While the description is empty (lowering confidence slightly), the naming convention and context of a read-heavy MCP server for scene inspection and manipulation support classifying this as a Read operation with low severity.
From the tool's definition Tool name 'list_available_assets' indicates querying or listing assets without modification. No description provided, but the verb 'list' is a classic read operation pattern consistent with sibling tools like 'list_level_actors' and 'get_*' tools on this…
Documented attack patterns abuse exactly the kind of access list_available_assets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Unreal, and nothing reaches the server without passing your rules. This is the rule we recommend for list_available_assets:
{
"version": "1",
"default": "deny",
"tools": {
"list_available_assets": {}
}
}list_available_assets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_available_assets. It is categorised as a Read tool in the Unreal MCP Server, which means it retrieves data without modifying state.
Register the Unreal MCP server in PolicyLayer and add a rule for list_available_assets: 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 Unreal. Nothing to install.
list_available_assets 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_available_assets 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_available_assets. 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_available_assets is provided by the Unreal MCP server (runeape-sats/unreal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 Unreal tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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21 Unreal tools catalogued and risk-classified — across an index of 42,500+ MCP servers.