AI agents call analyze_dns to retrieve information from Tshark without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
DNS analysis retrieves and interprets packet data without modifying network state, configuration, or DNS records. Even if it could theoretically trigger DNS queries, the verb 'analyze' combined with the tshark context (a read-only packet analyzer) indicates passive inspection only. No side effects, destructive operations, code execution, or financial impact.
From the tool's definition Tool is named 'analyze_dns' and exists in a network packet analysis server (tshark-mcp) alongside other analysis tools like 'analyze_pcap_file', 'extract_fields', and 'extract_packet_details'. All sibling tools are read-only analysis operations.
Attacks that exploit this kind of access
analyze_dns. It is categorised as a Read tool in the Tshark MCP Server, which means it retrieves data without modifying state.
Register the Tshark MCP server in PolicyLayer and add a rule for analyze_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 Tshark. Nothing to install.
analyze_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 analyze_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 analyze_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.
analyze_dns is provided by the Tshark MCP server (ouonet/tshark-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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