AI agents call net_reverse_dns to retrieve information from LuzzyTool without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves DNS information by querying network services. It reads and returns data (domain names from IP addresses) without creating, modifying, deleting, or executing operations. DNS lookups are informational retrieval operations classified as Read. Severity is low because DNS queries are non-destructive and have minimal blast radius—they only reveal existing network information.
From the tool's definition Tool performs DNS resolution query: '反向 DNS 查询，将 IP 地址解析为域名' (reverse DNS query, resolves IP addresses to domain names). This is a network diagnostic lookup operation with no side effects.
Attacks that exploit this kind of access
【网络诊断】反向 DNS 查询，将 IP 地址解析为域名。. It is categorised as a Read tool in the LuzzyTool MCP Server, which means it retrieves data without modifying state.
Register the LuzzyTool MCP server in PolicyLayer and add a rule for net_reverse_dns: 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 LuzzyTool. Nothing to install.
net_reverse_dns 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 net_reverse_dns 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 net_reverse_dns. 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.
net_reverse_dns is provided by the LuzzyTool MCP server (luzzymeow/luzzytool). 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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