check_mcp_health

THE RISK

Low Risk

Why check_mcp_health needs a policy

This tool performs a read-only health check operation. It queries the status of MCPs but does not execute code, modify data, delete resources, or move money. The blast radius of misuse is minimal—an agent could only gain visibility into system health metrics, which is informational. No side effects or state changes occur.

From the tool's definition Tool name 'check_mcp_health' and description 'Check the health status of all integrated MCPs' indicate a monitoring/querying operation that retrieves status information without modifying, executing, or deleting anything.

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

POLICY

How to control check_mcp_health

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

policy.json

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

check_mcp_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 MCP Conductor — 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 →

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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 →
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FAQ

Questions about check_mcp_health

What does the check_mcp_health tool do? +

Check the health status of all integrated MCPs. It is categorised as a Read tool in the MCP Conductor MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_mcp_health? +

Register the MCP Conductor MCP server in PolicyLayer and add a rule for check_mcp_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 MCP Conductor. Nothing to install.

What risk level is check_mcp_health? +

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

Can I rate-limit check_mcp_health? +

Yes. Add a rate_limit block to the check_mcp_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 check_mcp_health completely? +

Set action: deny in the PolicyLayer policy for check_mcp_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 check_mcp_health? +

check_mcp_health is provided by the MCP Conductor MCP server (lutherscottgarcia/mcp-conductor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Conductor tool call.

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

CHECK YOUR STACK →