create_workout · Hevy MCP: Risk & Policy

WHAT IT DOES

What create_workout does on Hevy

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

WHY IT NEEDS A POLICY

Why create_workout needs a policy

The tool creates new fitness data (workout logs) within the user's Hevy account. This is a Write operation because it creates/modifies data reversibly without irreversible deletion or financial consequences. Severity is medium because misuse could flood the workout log with spurious entries, but the impact is limited to the user's own fitness data and can be undone.

From the tool's definition Tool name 'create_workout' indicates creation of a new workout record in the Hevy fitness app. Server description states the tool 'Log workouts' and covers 'all 25 endpoints of the official Hevy API.' Creating a workout record is a reversible write operation…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_workout Rate-limited

create_workout 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_workout": {
      "limits": [
        {
          "counter": "create_workout_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 Hevy, so you can run agents against it safely.

FAQ

Questions about create_workout

What does the create_workout tool do? +

create_workout. It is categorised as a Write tool in the Hevy 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_workout? +

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

What risk level is create_workout? +

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

Can I rate-limit create_workout? +

Yes. Add a rate_limit block to the create_workout 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_workout completely? +

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

create_workout is provided by the Hevy MCP server (srdjancodes/hevy-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.