list_listening_ports
AI agents call list_listening_ports to retrieve information from Allcanuse without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about ports currently in a listening state on the system. No data is modified, deleted, or executed—it is purely informational, similar to running 'netstat -l' or 'ss -l'. Even if misused by an AI agent, the worst outcome is information disclosure about the local system's network configuration, which is low-risk compared to command execution or data destruction.
From the tool's definition Tool name 'list_listening_ports' indicates querying/retrieving network state information. Description is empty, but the name strongly suggests a read-only network diagnostic operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_listening_ports gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Allcanuse, and nothing reaches the server without passing your rules. This is the rule we recommend for list_listening_ports:
{
"version": "1",
"default": "deny",
"tools": {
"list_listening_ports": {}
}
}list_listening_ports is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_listening_ports. It is categorised as a Read tool in the Allcanuse MCP Server, which means it retrieves data without modifying state.
Register the Allcanuse MCP server in PolicyLayer and add a rule for list_listening_ports: 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 Allcanuse. Nothing to install.
list_listening_ports 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_listening_ports 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_listening_ports. 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_listening_ports is provided by the Allcanuse MCP server (ra1nyxin/allcanuse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Allcanuse, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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130 Allcanuse tools catalogued and risk-classified — across an index of 43,000+ MCP servers.