add_weigh_in · Garmin MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_weigh_in does on Garmin MCP Server

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

WHY IT NEEDS A POLICY

Why add_weigh_in needs a policy

This tool creates a new weight measurement record in Garmin Connect. It is reversible (the delete_weigh_ins sibling tool confirms deletability), has no external financial impact, does not execute arbitrary code, and does not destructively overwrite existing data. It fits the Write category: creates or modifies data reversibly.

From the tool's definition Tool name 'add_weigh_in' and description 'Add a new weight measurement' indicate creation of a new data record.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_weigh_in Rate-limited

add_weigh_in 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": {
    "add_weigh_in": {
      "limits": [
        {
          "counter": "add_weigh_in_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 Garmin MCP Server, so you can run agents against it safely.

FAQ

Questions about add_weigh_in

What does the add_weigh_in tool do? +

Add a new weight measurement. It is categorised as a Write tool in the Garmin 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 add_weigh_in? +

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

What risk level is add_weigh_in? +

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

Can I rate-limit add_weigh_in? +

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

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

add_weigh_in is provided by the Garmin MCP Server MCP server (shubhaankar-sharma/garmin-mcp-railway). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.