AI agents call get_system_info 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 only reads and returns static system metadata (OS version, hardware specs, memory). It performs no modifications, deletions, executions, or financial operations. The blast radius of misuse is minimal since this information is typically already accessible to any process running on the system. Classification as Read is appropriate.
From the tool's definition Tool name is 'get_system_info' and description states it 'Retrieves macOS system information including version, hardware model, processor, and memory' — purely informational queries with no side effects.
Attacks that exploit this kind of access
Retrieves macOS system information including version, hardware model, processor, and memory. 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_system_info: 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_system_info 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_system_info 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_system_info. 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_system_info 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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