reset_counter

Reset a counter helper to 0.

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/reset-counter.md

WHAT IT DOES

What reset_counter does on Ha Nexus Agent

AI agents use reset_counter 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 reset_counter is rated Medium

Resetting a counter modifies its value back to zero, which is a reversible write operation. It has minimal blast radius as it only affects a numeric counter helper in Home Assistant.

From the tool's definition Reset a counter helper to 0

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs reset_counter 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 reset_counter, this is the rule to start with:

reset_counter Rate-limited

reset_counter 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": {
    "reset_counter": {
      "limits": [
        {
          "counter": "reset_counter_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 reset_counter call is checked against it from then on.

FAQ

Questions about reset_counter

What does the reset_counter tool do? +

Reset a counter helper to 0. 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 reset_counter? +

Register the Ha Nexus Agent MCP server in PolicyLayer and add a rule for reset_counter: 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 reset_counter? +

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

Can I rate-limit reset_counter? +

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

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

reset_counter 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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