set_alarm · Whoop MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_alarm does on Whoop MCP Server

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

WHY IT NEEDS A POLICY

Why set_alarm needs a policy

This tool modifies alarm configuration state on the Whoop device/app, which is a reversible write operation. It does not delete data (Destructive), execute arbitrary code (Execute), involve financial transactions (Financial), or trigger irreversible changes. The impact is limited to user-controlled alarm settings with minimal blast radius if misconfigured by an AI agent.

From the tool's definition Tool description states 'Set or disable the Whoop alarm,' which are reversible modifications to alarm settings. The time parameter (HH:MM format) is a configuration input that can be subsequently changed or disabled.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_alarm Rate-limited

set_alarm 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_alarm": {
      "limits": [
        {
          "counter": "set_alarm_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about set_alarm

What does the set_alarm tool do? +

Set or disable the Whoop alarm. Time in HH:MM format. It is categorised as a Write tool in the Whoop MCP Server 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_alarm? +

Register the Whoop MCP Server MCP server in PolicyLayer and add a rule for set_alarm: 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 Whoop MCP Server. Nothing to install.

What risk level is set_alarm? +

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

Can I rate-limit set_alarm? +

Yes. Add a rate_limit block to the set_alarm 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_alarm completely? +

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

set_alarm is provided by the Whoop MCP Server MCP server (jd1207/whoop-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.