check_vpd_drift · AC Infinity MCP: Risk & Policy

WHAT IT DOES

What check_vpd_drift does on AC Infinity MCP

AI agents call check_vpd_drift to retrieve information from AC Infinity MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why check_vpd_drift needs a policy

VPD (vapor pressure deficit) drift checking is a diagnostic/analytical operation common in HVAC and grow room management. The name pattern 'check_' indicates a read operation. Given the MCP server's stated capability to 'read live sensor data' and 'run analytics', this tool almost certainly retrieves or computes metrics from existing sensor data without causing side effects.

From the tool's definition Tool name 'check_vpd_drift' implies a query or monitoring operation (checking vapor pressure deficit drift).

Attacks that exploit this kind of access

Questions about check_vpd_drift

What does the check_vpd_drift tool do? +

check_vpd_drift. It is categorised as a Read tool in the AC Infinity MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_vpd_drift? +

Register the AC Infinity MCP server in PolicyLayer and add a rule for check_vpd_drift: 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 AC Infinity MCP. Nothing to install.

What risk level is check_vpd_drift? +

check_vpd_drift is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit check_vpd_drift? +

Yes. Add a rate_limit block to the check_vpd_drift 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.

How do I block check_vpd_drift completely? +

Set action: deny in the PolicyLayer policy for check_vpd_drift. 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.

What MCP server provides check_vpd_drift? +

check_vpd_drift is provided by the AC Infinity MCP server (ober37/ac-infinity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.