AI agents call health_check to retrieve information from Ogham without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a passive health status check against external services. It retrieves or queries connectivity state without side effects, side-channel impacts, or the ability to trigger operations. The result is informational only. This aligns with the Read category: retrieves status/state data with no side effects.
From the tool's definition Tool name 'health_check' and description 'Check connectivity to Supabase and the embedding provider' indicate a diagnostic query that verifies system status without modifying, executing external operations, or affecting data.
Attacks that exploit this kind of access
Check connectivity to Supabase and the embedding provider. It is categorised as a Read tool in the Ogham MCP Server, which means it retrieves data without modifying state.
Register the Ogham 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 Ogham. 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 Ogham MCP server (ogham-mcp/ogham-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.
Teams ship this data inside their own products. See what a licence covers →