health_check

THE RISK

Low Risk

Why health_check needs a policy

This tool retrieves status information about server and API connectivity. It is a read-only operation that queries the current state without modifying data, executing code with side effects, or triggering financial transactions. The low severity reflects minimal blast radius—misuse would only expose operational status information.

From the tool's definition Tool name 'health_check' and description 'Check server health and API connectivity status' indicate a diagnostic query operation with no side effects, data modification, or external state changes.

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

POLICY

How to control health_check

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

policy.json

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

health_check 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 TradingView 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 health_check

What does the health_check tool do? +

Check server health and API connectivity status. It is categorised as a Read tool in the TradingView MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on health_check? +

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

What risk level is health_check? +

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

Can I rate-limit health_check? +

Yes. Add a rate_limit block to the health_check 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 health_check completely? +

Set action: deny in the PolicyLayer policy for health_check. 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 health_check? +

health_check is provided by the TradingView MCP Server MCP server (lev-corrupted/tradingviewmcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every TradingView MCP Server tool call.

Start from TradingView 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 →