list_heartbeats
AI agents call list_heartbeats to retrieve information from Pingera MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'list_' prefix strongly indicates a read-only operation that queries and returns heartbeat data without modifying, executing, or destroying anything. No evidence suggests this tool performs write, execute, destructive, or financial operations.
From the tool's definition Tool name 'list_heartbeats' follows the 'list_*' naming convention, which typically indicates data retrieval without side effects.
Attacks that exploit this kind of access
list_heartbeats. It is categorised as a Read tool in the Pingera MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Pingera MCP Server MCP server in PolicyLayer and add a rule for list_heartbeats: 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 Pingera MCP Server. Nothing to install.
list_heartbeats 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 list_heartbeats 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 list_heartbeats. 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.
list_heartbeats is provided by the Pingera MCP Server MCP server (pingera/pingera-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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