Comprehensive health check of the server and database connection
AI agents call health_check to retrieve information from SQL Server MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Health checks are read-only diagnostic operations that retrieve system state information without creating, modifying, deleting, or executing arbitrary operations. The tool only retrieves connection and server status data, making it a Read category risk with low severity due to its minimal blast radius if misused.
From the tool's definition health_check performs a 'comprehensive health check of the server and database connection' with no modification or execution capabilities mentioned. It queries the status of the system without side effects.
Attacks that exploit this kind of access
Comprehensive health check of the server and database connection. It is categorised as a Read tool in the SQL Server MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SQL Server 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 SQL Server MCP Server. 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 SQL Server MCP Server MCP server (stevezhuhaobo/sql-server-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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