AI agents call system_uptime to retrieve information from Mcp Windows without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves read-only information about how long the system has been running. It performs no writes, deletions, code execution, or financial operations. The blast radius of misuse is minimal—an attacker gaining access to uptime information poses negligible risk compared to other system management tools available on this server.
From the tool's definition Tool name 'system_uptime' and description 'Get system uptime information' indicate a query operation that retrieves system metrics without modification or side effects.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access system_uptime gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Windows, and nothing reaches the server without passing your rules. This is the rule we recommend for system_uptime:
{
"version": "1",
"default": "deny",
"tools": {
"system_uptime": {}
}
}system_uptime is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get system uptime information. It is categorised as a Read tool in the Mcp Windows MCP Server, which means it retrieves data without modifying state.
Register the Mcp Windows MCP server in PolicyLayer and add a rule for system_uptime: 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 Mcp Windows. Nothing to install.
system_uptime 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 system_uptime 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 system_uptime. 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.
system_uptime is provided by the Mcp Windows MCP server (mukul975/mcp-windows-automation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 441 Mcp Windows tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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441 Mcp Windows tools catalogued and risk-classified — across an index of 42,500+ MCP servers.