Get VO2 max trend over a date range. Returns daily VO2 max estimates from Garmin's FirstBeat algorithm. Use this to track whether training is producing fitness gains over weeks or months. Flat or declining VO2 max over 4+ weeks suggests insufficient training stimulus or overreaching. Note: VO2 ma...
AI agents call get_vo2max_trend to retrieve information from Garmin MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only operation that retrieves existing health data without side effects. The user's fitness metrics are queried but not altered. While health data is sensitive personal information, the read-only nature and lack of external effects place this in the Read category with low severity—the primary risk is information disclosure rather than misuse that could cause irreversible harm or financial loss.
From the tool's definition Tool performs a data retrieval operation: 'Get VO2 max trend over a date range' and 'Returns daily VO2 max estimates'. No modification, creation, deletion, or execution of commands occurs. The tool queries historical fitness metrics from Garmin Connect.
Documented attack patterns abuse exactly the kind of access get_vo2max_trend gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Garmin MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_vo2max_trend:
{
"version": "1",
"default": "deny",
"tools": {
"get_vo2max_trend": {}
}
}get_vo2max_trend is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get VO2 max trend over a date range. Returns daily VO2 max estimates from Garmin's FirstBeat algorithm. Use this to track whether training is producing fitness gains over weeks or months. Flat or declining VO2 max over 4+ weeks suggests insufficient training stimulus or overreaching. Note: VO2 max estimates are smoothed and update gradually — daily changes of <0.5 are within normal noise. Focus on the 4-6 week trend direction. Recommended range: 4-12 weeks. Maximum: 90 days. Args: start_date: Start date in YYYY-MM-DD format end_date: End date in YYYY-MM-DD format. It is categorised as a Read tool in the Garmin MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Garmin MCP Server MCP server in PolicyLayer and add a rule for get_vo2max_trend: 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.
get_vo2max_trend is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_vo2max_trend 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.
Set action: deny in the PolicyLayer policy for get_vo2max_trend. 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.
get_vo2max_trend is provided by the Garmin MCP Server MCP server (taxuspt/garmin_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 126 Garmin MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
126 Garmin MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.