AI agents call zeek_query_dns to retrieve information from Zeek without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing DNS log data from Zeek without creating, modifying, or deleting records. It performs passive searches with filtering—characteristic of Read category operations. No execution of external commands, no data modification, and no destructive actions are indicated.
From the tool's definition Tool description states 'Search Zeek DNS query logs' with filtering capabilities (wildcard matching, query type, response code). The term 'search' and 'query logs' indicate read-only retrieval operations with no modifications to data.
Attacks that exploit this kind of access
Search Zeek DNS query logs. Supports wildcard domain matching, query type filtering, and response code filtering. It is categorised as a Read tool in the Zeek MCP Server, which means it retrieves data without modifying state.
Register the Zeek MCP server in PolicyLayer and add a rule for zeek_query_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 Zeek. Nothing to install.
zeek_query_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 zeek_query_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 zeek_query_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.
zeek_query_dns is provided by the Zeek MCP server (solomonneas/zeek-mcp). 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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