Prefab card: unified PLG stack health (Grafana, Prometheus, Loki).
AI agents call observability_stack_health_card to retrieve information from Observability 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 and displays pre-formatted observability data (health status of monitoring infrastructure) without modifying any systems, executing code, or triggering side effects. It is a read-only dashboard or status view. No blast radius from misuse—at worst, an agent views incorrect monitoring data but cannot harm systems or data integrity.
From the tool's definition Tool description indicates it provides a 'prefab card' for viewing 'unified PLG stack health' of monitoring systems (Grafana, Prometheus, Loki).
Attacks that exploit this kind of access
Prefab card: unified PLG stack health (Grafana, Prometheus, Loki). It is categorised as a Read tool in the Observability MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Observability MCP Server MCP server in PolicyLayer and add a rule for observability_stack_health_card: 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 Observability MCP Server. Nothing to install.
observability_stack_health_card 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 observability_stack_health_card 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 observability_stack_health_card. 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.
observability_stack_health_card is provided by the Observability MCP Server MCP server (sandraschi/observability-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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