set_climate_mode

Set climate HVAC mode (heat, cool, auto, off, fan_only, dry).

SERVERHa Nexus Agent SOURCEfistacho/ha-nexus-agent

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/fistacho-ha-nexus-agent/set-climate-mode.md

WHAT IT DOES

What set_climate_mode does on Ha Nexus Agent

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

RISK

Why set_climate_mode is rated Medium

This tool modifies the operating mode of a climate/HVAC system. It is a reversible write operation — the mode can be changed again at any time. Misuse could cause discomfort or wasted energy (e.g., heating in summer or turning off climate in extreme weather), warranting medium severity.

From the tool's definition Set climate HVAC mode (heat, cool, auto, off, fan_only, dry)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_climate_mode safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ha Nexus Agent, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_climate_mode, this is the rule to start with:

set_climate_mode Rate-limited

set_climate_mode 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_climate_mode": {
      "limits": [
        {
          "counter": "set_climate_mode_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ha Nexus Agent, apply this rule, and every set_climate_mode call is checked against it from then on.

FAQ

Questions about set_climate_mode

What does the set_climate_mode tool do? +

Set climate HVAC mode (heat, cool, auto, off, fan_only, dry). It is categorised as a Write tool in the Ha Nexus Agent 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_climate_mode? +

Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for set_climate_mode: 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 Ha Nexus Agent. Nothing to install.

What risk level is set_climate_mode? +

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

Can I rate-limit set_climate_mode? +

Yes. Add a rate_limit block to the set_climate_mode 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_climate_mode completely? +

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

set_climate_mode is provided by the Ha Nexus Agent MCP server (fistacho/ha-nexus-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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