Get VO2 max and related fitness metrics for a given date.
AI agents call get_max_metrics to retrieve information from Mcp Garmin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves health metric data without any side effects, modifications, or external operations. It follows the Read category pattern of fetch/get operations. The server explicitly declares read-only access, and all sibling tools are also retrieval operations. The severity is low as exposure of fitness metrics poses minimal security risk to system integrity or data integrity.
From the tool's definition Server is described as 'read-only access to daily health metrics' and tool retrieves 'VO2 max and related fitness metrics' for a date without modifying data.
Attacks that exploit this kind of access
Get VO2 max and related fitness metrics for a given date. It is categorised as a Read tool in the Mcp Garmin MCP Server, which means it retrieves data without modifying state.
Register the Mcp Garmin MCP server in PolicyLayer and add a rule for get_max_metrics: 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 Mcp Garmin. Nothing to install.
get_max_metrics 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_max_metrics 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_max_metrics. 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_max_metrics is provided by the Mcp Garmin MCP server (obrien-matthew/mcp-garmin). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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