Get heart rate data in different time zones for an activity
AI agents call get_activity_hr_in_timezones to retrieve information from Garmin MCP Server for Poke without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves (gets) heart rate data and presents it in different time zones. It performs a query operation without creating, modifying, deleting, or executing any actions. The verb 'Get' and the absence of any mutative language confirm this is a Read operation. Heart rate data is personal health information, but retrieval alone poses minimal risk compared to modification or deletion of such data.
From the tool's definition Tool name 'get_activity_hr_in_timezones' and description 'Get heart rate data in different time zones for an activity' indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Get heart rate data in different time zones for an activity. It is categorised as a Read tool in the Garmin MCP Server for Poke MCP Server, which means it retrieves data without modifying state.
Register the Garmin MCP Server for Poke MCP server in PolicyLayer and add a rule for get_activity_hr_in_timezones: 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 for Poke. Nothing to install.
get_activity_hr_in_timezones 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_hr_in_timezones 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_hr_in_timezones. 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_hr_in_timezones is provided by the Garmin MCP Server for Poke MCP server (theol0403/garmin-mcp-poke). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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