create_activity · Whoop MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_activity does on Whoop MCP Server

AI agents use create_activity 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 create_activity needs a policy

This tool creates and records new data (activities) in the Whoop health platform, making it a Write operation. It is reversible (activities can be deleted via the delete_activity sibling tool) and has low severity since logging wellness activities cannot cause financial harm, data destruction, or harmful code execution. The blast radius of misuse is limited to spurious health log entries that can be undone.

From the tool's definition Tool description explicitly states 'Log a simple activity' which creates new activity records in Whoop's health tracking system. The examples (sauna, ice_bath, meditation, yoga, stretching) are non-destructive health logging actions.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_activity Rate-limited

create_activity 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": {
    "create_activity": {
      "limits": [
        {
          "counter": "create_activity_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 create_activity

What does the create_activity tool do? +

Log a simple activity to Whoop (sauna, ice_bath, meditation, yoga, stretching, etc). 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 create_activity? +

Register the Whoop MCP Server MCP server in PolicyLayer and add a rule for create_activity: 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 create_activity? +

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

Can I rate-limit create_activity? +

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

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

create_activity 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.