Get top DNS clients by query count.
AI agents call get_top_clients to retrieve information from Mcp Pihole without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves DNS client statistics and query counts from the Pi-hole server. It performs a read-only query operation with no side effects, no data modification, and no irreversible actions. The blast radius of misuse is minimal—an attacker gains only visibility into DNS client activity, which is already observable to any network participant.
From the tool's definition Tool name 'get_top_clients' and description 'Get top DNS clients by query count' indicate a retrieval operation that queries and returns data without modifying state.
Attacks that exploit this kind of access
Get top DNS clients by query count. It is categorised as a Read tool in the Mcp Pihole MCP Server, which means it retrieves data without modifying state.
Register the Mcp Pihole MCP server in PolicyLayer and add a rule for get_top_clients: 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 Mcp Pihole. Nothing to install.
get_top_clients 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 get_top_clients 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 get_top_clients. 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.
get_top_clients is provided by the Mcp Pihole MCP server (obrien-matthew/mcp-pihole). 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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