AI agents call clo_ping to retrieve information from Clo3d without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a diagnostic ping/health-check tool that only verifies CLO3D is running and accessible. It reads state (is the application open and reachable?) without modifying, creating, deleting, or executing anything. Misuse potential is negligible.
From the tool's definition "Check that CLO is open and the listener is reachable" — purely a connectivity/health check with no side effects
Attacks that exploit this kind of access
Check that CLO is open and the listener is reachable. It is categorised as a Read tool in the Clo3d MCP Server, which means it retrieves data without modifying state.
Register the Clo3d MCP server in PolicyLayer and add a rule for clo_ping: 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 Clo3d. Nothing to install.
clo_ping 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 clo_ping 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 clo_ping. 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.
clo_ping is provided by the Clo3d MCP server (lilbonner/clo3d-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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