List USB devices connected to the NAS.
AI agents call list_usb_devices to retrieve information from Synology MCP Server 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 connected USB devices without modifying, deleting, executing code, or triggering financial transactions. It is a passive enumeration of hardware state, consistent with the Read category.
From the tool's definition Tool name is 'list_usb_devices' and description states 'List USB devices connected to the NAS' — both indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List USB devices connected to the NAS. It is categorised as a Read tool in the Synology MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Synology MCP Server MCP server in PolicyLayer and add a rule for list_usb_devices: 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 Synology MCP Server. Nothing to install.
list_usb_devices 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_usb_devices 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_usb_devices. 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_usb_devices is provided by the Synology MCP Server MCP server (rafalr100/synology-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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