Run a comprehensive health check on the level (overlaps, errors, warnings).
AI agents call level_health_check 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 performs analysis and validation of the level without side effects. It queries the state of the level to identify issues and reports findings, consistent with Read category tools. Severity is low because misuse results in harmless information gathering.
From the tool's definition The description states 'Run a comprehensive health check on the level (overlaps, errors, warnings)' which indicates diagnostic/reporting functionality with no modification of state.
Documented attack patterns abuse exactly the kind of access level_health_check 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 level_health_check:
{
"version": "1",
"default": "deny",
"tools": {
"level_health_check": {}
}
}level_health_check is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Run a comprehensive health check on the level (overlaps, errors, warnings). 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 level_health_check: 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.
level_health_check 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 level_health_check 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 level_health_check. 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.
level_health_check 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.