get_system_health

THE RISK

Low Risk

Why get_system_health needs a policy

This tool retrieves diagnostic information about system performance. It does not create, modify, delete, or execute operations. It is purely informational and read-only, posing minimal risk even if invoked by an AI agent. The low severity reflects that health metrics are non-sensitive operational data with no blast radius.

From the tool's definition Tool name 'get_system_health' and description 'Get system health and performance metrics' indicate a retrieval-only operation that queries system status without modification or side effects.

Documented attack patterns abuse exactly the kind of access get_system_health gives an agent:

POLICY

How to control get_system_health

PolicyLayer is an MCP gateway — it sits between your AI agents and FoundryVTT MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_system_health:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_system_health": {}
  }
}

get_system_health is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register FoundryVTT MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_system_health

What does the get_system_health tool do? +

Get system health and performance metrics. It is categorised as a Read tool in the FoundryVTT MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_system_health? +

Register the FoundryVTT MCP Server MCP server in PolicyLayer and add a rule for get_system_health: 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 FoundryVTT MCP Server. Nothing to install.

What risk level is get_system_health? +

get_system_health is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_system_health? +

Yes. Add a rate_limit block to the get_system_health 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.

How do I block get_system_health completely? +

Set action: deny in the PolicyLayer policy for get_system_health. 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.

What MCP server provides get_system_health? +

get_system_health is provided by the FoundryVTT MCP Server MCP server (laurigates/foundryvtt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every FoundryVTT MCP Server tool call.

Start from FoundryVTT MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →