create_workout · Hevy MCP: Risk & Policy

WHAT IT DOES

What create_workout does on Hevy MCP

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

WHY IT NEEDS A POLICY

Why create_workout needs a policy

Creating a new workout record is a write operation—it modifies the user's fitness data by adding a new entry. This is reversible (the record can be deleted or edited later), so it does not qualify as Destructive.

From the tool's definition Tool name is 'create_workout' with no description provided. Based on the server's stated purpose of 'logging new fitness sessions' and the sibling tool pattern (create_routine, update_routine, update_workout), this tool creates new workout records in the Hevy…

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"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Hevy MCP, 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 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 MCP. 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 (zachsai/hevy-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.