AI agents call get_battery_level to retrieve information from DeviceMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves battery status information from the device without modifying any data or triggering external operations. It is a simple read-only query of device state, consistent with the informational purpose of the DeviceMCP server. The empty description slightly reduces confidence, but the tool name and server context make the classification clear.
From the tool's definition Tool name 'get_battery_level' and sibling tools ('get_device_info', 'get_memory_info', 'get_storage_info', 'get_system_summary') are all query/retrieval operations.
Attacks that exploit this kind of access
get_battery_level. It is categorised as a Read tool in the DeviceMCP MCP Server, which means it retrieves data without modifying state.
Register the Device MCP server in PolicyLayer and add a rule for get_battery_level: 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 DeviceMCP. Nothing to install.
get_battery_level 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 get_battery_level 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 get_battery_level. 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.
get_battery_level is provided by the Device MCP server (jahidhasanco/devicemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_battery_level is one line of Device's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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