List available serial ports on the system.
AI agents call serial_list_ports to retrieve information from MCP Remote Access without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves a list of available serial ports—a read-only information query with no side effects, no code execution, and no ability to modify state. The blast radius of misuse is minimal; an attacker gains only knowledge of what serial devices are present on the system, which is already discoverable through other means. It falls clearly into the Read category.
From the tool's definition Tool name 'serial_list_ports' and description 'List available serial ports on the system' indicate a query operation that retrieves information about hardware without modifying or executing anything.
Attacks that exploit this kind of access
List available serial ports on the system. It is categorised as a Read tool in the MCP Remote Access MCP Server, which means it retrieves data without modifying state.
Register the MCP Remote Access MCP server in PolicyLayer and add a rule for serial_list_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 MCP Remote Access. Nothing to install.
serial_list_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 serial_list_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 serial_list_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.
serial_list_ports is provided by the MCP Remote Access MCP server (rfingadam/mcp-remote-access). 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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