tp_update_hr_zones · TrainingPeaks- MCP: Risk & Policy

WHAT IT DOES

What tp_update_hr_zones does on TrainingPeaks-MCP

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

WHY IT NEEDS A POLICY

Why tp_update_hr_zones needs a policy

This tool creates or modifies heart rate zone settings, which are reversible configuration changes to a user's training profile. While heart rate zones are important for training guidance, updating them does not irreversibly delete data, execute external commands, move money, or trigger destructive operations.

From the tool's definition Tool name 'tp_update_hr_zones' with description 'Update heart rate zones' indicates modification of athlete configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tp_update_hr_zones Rate-limited

tp_update_hr_zones 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": {
    "tp_update_hr_zones": {
      "limits": [
        {
          "counter": "tp_update_hr_zones_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 TrainingPeaks-MCP, so you can run agents against it safely.

FAQ

Questions about tp_update_hr_zones

What does the tp_update_hr_zones tool do? +

Update heart rate zones. It is categorised as a Write tool in the TrainingPeaks-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 tp_update_hr_zones? +

Register the TrainingPeaks- MCP server in PolicyLayer and add a rule for tp_update_hr_zones: 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 TrainingPeaks-MCP. Nothing to install.

What risk level is tp_update_hr_zones? +

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

Can I rate-limit tp_update_hr_zones? +

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

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

tp_update_hr_zones is provided by the TrainingPeaks- MCP server (jamsusmaximus/trainingpeaks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.