health_check

Gets health status of the MCP server.

SERVEROpen Stocks MCP SOURCEopen-agent-tools/open-stocks-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/open-agent-tools-open-stocks-mcp/health-check.md

WHAT IT DOES

What health_check does on Open Stocks MCP

AI agents call health_check to retrieve information from Open Stocks MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why health_check is rated Low

This tool retrieves status information about the MCP server itself with no side effects, no data modification, and no external operations triggered. It is a diagnostic query operation typical of health monitoring endpoints, making it a straightforward Read category tool with low severity.

From the tool's definition Tool name 'health_check' and description 'Gets health status of the MCP server' indicate a read-only operation that queries server status without modifying or executing operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs health_check safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Open Stocks MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For health_check, this is the rule to start with:

health_check Allowed

health_check is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Open Stocks MCP, apply this rule, and every health_check call is checked against it from then on.

FAQ

Questions about health_check

What does the health_check tool do? +

Gets health status of the MCP server. It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on health_check? +

Register the Open Stocks 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 Open Stocks MCP. 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 Open Stocks MCP server (open-agent-tools/open-stocks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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