AI agents call list_clients to retrieve information from Mitm without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a straightforward query of existing network lease data. It does not create, modify, delete, or execute any operations—it simply reads and returns a list of connected clients.
From the tool's definition Tool 'list_clients' retrieves DHCP client information from the dnsmasq leases file. The verb 'list' and action of querying a file indicate read-only data retrieval with no modification or side effects.
Attacks that exploit this kind of access
List DHCP clients from the dnsmasq leases file. It is categorised as a Read tool in the Mitm MCP Server, which means it retrieves data without modifying state.
Register the Mitm MCP server in PolicyLayer and add a rule for list_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 Mitm. Nothing to install.
list_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 list_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 list_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.
list_clients is provided by the Mitm MCP server (mplogas/mitmproxy-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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