Discover Nest Protect Devices.
AI agents call list_nest_devices to retrieve information from Nest Protect 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 or enumerates information about connected Nest Protect smoke and CO detector devices. It queries device inventory without creating, modifying, deleting, executing code, moving money, or triggering state changes. The blast radius of misuse is minimal—an attacker learns which devices exist but cannot control them or cause harm. Classified as Read with low severity.
From the tool's definition Tool name 'list_nest_devices' and description 'Discover Nest Protect Devices' indicate a data retrieval operation with no modifications, side effects, or external command execution. The verb 'list' is a classic Read-category operation.
Attacks that exploit this kind of access
Discover Nest Protect Devices. It is categorised as a Read tool in the Nest Protect MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nest Protect MCP Server MCP server in PolicyLayer and add a rule for list_nest_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 Nest Protect MCP Server. Nothing to install.
list_nest_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_nest_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_nest_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_nest_devices is provided by the Nest Protect MCP Server MCP server (sandraschi/nest-protect-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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