AI agents call list_routes to retrieve information from Defined without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query of network routes without returning full firewall rule details. It retrieves and displays existing configuration data without creating, modifying, deleting, or executing any actions. The explicit mention of 'summary' and exclusion of 'full firewall rules' confirms it is informational only. Blast radius is minimal since misuse only exposes existing network configuration data.
From the tool's definition Tool name is 'list_routes' and description explicitly states it 'List routes (summary, without full firewall rules)' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List routes (summary, without full firewall rules). It is categorised as a Read tool in the Defined MCP Server, which means it retrieves data without modifying state.
Register the Defined MCP server in PolicyLayer and add a rule for list_routes: 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 Defined. Nothing to install.
list_routes 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_routes 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_routes. 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_routes is provided by the Defined MCP server (quickvm/defined-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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