AI agents call get_activity to retrieve information from Garmin Connect without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool fetches and returns activity summary data from Garmin Connect. It performs no write, deletion, execution, or financial operations. The operation is a straightforward data retrieval with no capability to alter state or trigger external processes. Low severity due to limited blast radius—misuse would only expose fitness/health data already accessible to the authenticated user.
From the tool's definition Tool name 'get_activity' and description 'Get summary data for a specific activity' indicate a query operation that retrieves existing data without modification or side effects.
Documented attack patterns abuse exactly the kind of access get_activity gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Garmin Connect, and nothing reaches the server without passing your rules. This is the rule we recommend for get_activity:
{
"version": "1",
"default": "deny",
"tools": {
"get_activity": {}
}
}get_activity is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get summary data for a specific activity. It is categorised as a Read tool in the Garmin Connect MCP Server, which means it retrieves data without modifying state.
Register the Garmin Connect MCP server in PolicyLayer and add a rule for get_activity: 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 Connect. Nothing to install.
get_activity 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_activity 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_activity. 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_activity is provided by the Garmin Connect MCP server (nicolasvegam/garmin-connect-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 97 Garmin Connect tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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97 Garmin Connect tools catalogued and risk-classified — across an index of 42,500+ MCP servers.