Health check endpoint that verifies the server is running.
AI agents call health_check to retrieve information from MCP Test MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Health checks are informational queries that test connectivity and service availability. They are read-only operations with no capacity to modify state, execute code, delete data, or affect financial systems. The low severity reflects minimal blast radius—even if an agent calls this repeatedly, it only reads server status.
From the tool's definition Tool name 'health_check' and description 'Health check endpoint that verifies the server is running' indicate a diagnostic query operation with no side effects. It retrieves status information without modifying, creating, or executing anything.
Attacks that exploit this kind of access
Health check endpoint that verifies the server is running. It is categorised as a Read tool in the MCP Test MCP MCP Server, which means it retrieves data without modifying state.
Register the MCP Test 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 MCP Test MCP. Nothing to install.
health_check 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 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.
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.
health_check is provided by the MCP Test MCP server (rdwj/mcp-test-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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