Get calculated fitness age for a given date.
AI agents call get_fitness_age 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 only retrieves pre-calculated fitness age data for a specified date from Garmin Connect. It has no side effects, does not modify data, execute code, or trigger external operations. It is a simple data query operation with minimal risk if misused—an agent could only over-query or access user health data they are already authorized to see.
From the tool's definition Tool name 'get_fitness_age' and server description explicitly states 'read-only access to daily health metrics'. The 'get_' prefix and all sibling tools (get_activities, get_activity_details, etc.) follow a consistent read-only retrieval pattern.
Attacks that exploit this kind of access
Get calculated fitness age 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_fitness_age: 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_fitness_age 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_fitness_age 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_fitness_age. 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_fitness_age 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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