AI agents call follow_tcp_stream to retrieve information from Wireshark MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reconstructs and displays TCP stream data from captured packets—a read-only query operation. While it accesses network traffic (potential information disclosure risk if misused on sensitive networks), it performs no write, execute, delete, or financial operations.
From the tool's definition Tool name 'follow_tcp_stream' matches sibling pattern (follow_udp_stream) which retrieves and reassembles network stream data.
Documented attack patterns abuse exactly the kind of access follow_tcp_stream gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Wireshark MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for follow_tcp_stream:
{
"version": "1",
"default": "deny",
"tools": {
"follow_tcp_stream": {}
}
}follow_tcp_stream is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
follow_tcp_stream. It is categorised as a Read tool in the Wireshark MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Wireshark MCP Server MCP server in PolicyLayer and add a rule for follow_tcp_stream: 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 Wireshark MCP Server. Nothing to install.
follow_tcp_stream 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 follow_tcp_stream 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 follow_tcp_stream. 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.
follow_tcp_stream is provided by the Wireshark MCP Server MCP server (mixelpixx/wireshark-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Wireshark MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
19 Wireshark MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.