List all available serial/COM ports on this machine.
AI agents call list_serial_ports to retrieve information from Network Device Assistant without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a passive enumeration of available serial ports on the host system. It queries existing hardware configuration and returns information with no side effects, no code execution, and no data modification. This is a straightforward read operation with minimal security impact—the information is discoverable through other standard system administration tools.
From the tool's definition Tool name 'list_serial_ports' and description 'List all available serial/COM ports on this machine' indicate a read-only operation that retrieves system information without modifying or executing anything.
Attacks that exploit this kind of access
List all available serial/COM ports on this machine. It is categorised as a Read tool in the Network Device Assistant MCP Server, which means it retrieves data without modifying state.
Register the Network Device Assistant MCP server in PolicyLayer and add a rule for list_serial_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 Network Device Assistant. Nothing to install.
list_serial_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_serial_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_serial_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_serial_ports is provided by the Network Device Assistant MCP server (mgarabito/network-device-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.
Teams ship this data inside their own products. See what a licence covers →