set_dhw_temperature · Zont MCP: Risk & Policy

WHAT IT DOES

What set_dhw_temperature does on Zont

AI agents use set_dhw_temperature to create or update resources in Zont — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Zont environment.

WHY IT NEEDS A POLICY

Why set_dhw_temperature needs a policy

This tool modifies a critical heating system parameter (DHW temperature). While not irreversible (temperature can be adjusted again), it affects physical infrastructure and user comfort/safety. Misuse by an AI agent could cause scalding hazards, energy waste, or system strain. Categorized as Write rather than Execute because it directly modifies a specific configuration value rather than running arbitrary operations.

From the tool's definition Tool name 'set_dhw_temperature' indicates modification of DHW (domestic hot water) temperature setpoint on a heating system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_dhw_temperature Rate-limited

set_dhw_temperature stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_dhw_temperature": {
      "limits": [
        {
          "counter": "set_dhw_temperature_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Zont, so you can run agents against it safely.

FAQ

Questions about set_dhw_temperature

What does the set_dhw_temperature tool do? +

set_dhw_temperature. It is categorised as a Write tool in the Zont MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_dhw_temperature? +

Register the Zont MCP server in PolicyLayer and add a rule for set_dhw_temperature: 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 Zont. Nothing to install.

What risk level is set_dhw_temperature? +

set_dhw_temperature is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit set_dhw_temperature? +

Yes. Add a rate_limit block to the set_dhw_temperature 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 set_dhw_temperature completely? +

Set action: deny in the PolicyLayer policy for set_dhw_temperature. 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 set_dhw_temperature? +

set_dhw_temperature is provided by the Zont MCP server (mab2908/zont-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.