Get activity breakdown by type, including counts, distances, and durations
AI agents call get_activities to retrieve information from Garmin Health MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves aggregated health metrics from Garmin/Supabase without modifying any data. It is a read-only query operation that surfaces existing activity statistics. The blast radius of misuse is minimal—an AI agent could only over-query or leak personal health data, not alter or delete records. Classified as Read with low severity.
From the tool's definition Tool name 'get_activities' and description 'Get activity breakdown by type' indicate a retrieval operation. The function retrieves and queries activity data (counts, distances, durations) with no modification capability.
Attacks that exploit this kind of access
Get activity breakdown by type, including counts, distances, and durations. It is categorised as a Read tool in the Garmin Health MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Garmin Health MCP Server MCP server in PolicyLayer and add a rule for get_activities: 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 Health MCP Server. Nothing to install.
get_activities 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_activities 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_activities. 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_activities is provided by the Garmin Health MCP Server MCP server (willc121/garmin-mcp-server). 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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