List connected simulators/devices. Returns deviceId, state, model. Use for other tools.
AI agents call list_devices to retrieve information from React Native without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a pure information retrieval operation. It queries the state of connected devices and returns metadata (deviceId, state, model) with no side effects, reversible operations, or capability to delete or modify data. It is foundational enumeration information used by other tools but carries minimal risk on its own.
From the tool's definition "List connected simulators/devices. Returns deviceId, state, model." - the tool retrieves and queries device information without modifying, deleting, or executing operations on those devices.
Attacks that exploit this kind of access
List connected simulators/devices. Returns deviceId, state, model. Use for other tools. It is categorised as a Read tool in the React Native MCP Server, which means it retrieves data without modifying state.
Register the React Native MCP server in PolicyLayer and add a rule for list_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 React Native. Nothing to install.
list_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_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_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_devices is provided by the React Native MCP server (@ohah/react-native-mcp-server). 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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