Check whether Visual Sentinel itself is up. Returns the service health status. No authentication required.
AI agents call vs_health to retrieve information from Visual Sentinel MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves status information about a service with no ability to modify, execute operations, or cause harm. It is a simple health check query, classified as Read category with low severity due to minimal blast radius if misused—an AI agent can only repeatedly query the status endpoint without impacting any monitored systems, data, or operations.
From the tool's definition Tool description states 'Check whether Visual Sentinel itself is up. Returns the service health status.' This is a query/status check operation with no side effects. 'No authentication required' confirms it is read-only access to public status information.
Attacks that exploit this kind of access
Check whether Visual Sentinel itself is up. Returns the service health status. No authentication required. It is categorised as a Read tool in the Visual Sentinel MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Visual Sentinel MCP Server MCP server in PolicyLayer and add a rule for vs_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 Visual Sentinel MCP Server. Nothing to install.
vs_health 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 vs_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.
Set action: deny in the PolicyLayer policy for vs_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.
vs_health is provided by the Visual Sentinel MCP Server MCP server (visualsentinel/mcp-server). 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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