AI agents call get_battery_status to retrieve information from Mac without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves system information (battery percentage and charging status) without modifying any data, executing code, or triggering external operations. It is purely informational and has no side effects. Classification as Read is appropriate. Severity is low because unauthorized access to battery status presents minimal security or operational risk.
From the tool's definition Tool name is 'get_battery_status' and description states it 'Gets battery percentage and charging status'. The verb 'Gets' and the read-only nature of querying battery information indicates no modification or execution of commands.
Attacks that exploit this kind of access
Gets battery percentage and charging status (MacBooks only, returns isDesktop: true for desktop Macs). It is categorised as a Read tool in the Mac MCP Server, which means it retrieves data without modifying state.
Register the Mac MCP server in PolicyLayer and add a rule for get_battery_status: 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 Mac. Nothing to install.
get_battery_status 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_status 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_status. 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_status is provided by the Mac MCP server (laststance/mac-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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