AI agents call get_blood_pressure 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 retrieves historical health data (blood pressure readings) without creating, modifying, deleting, or executing operations. It is a read-only query of existing personal health metrics, presenting minimal risk even if misused by an AI agent — the worst outcome would be unauthorized access to already-recorded health data, not new harm.
From the tool's definition Tool name is 'get_blood_pressure' and description states 'Get blood pressure readings over a date range' — the verb 'Get' and lack of any modification language indicate pure data retrieval with no side effects.
Documented attack patterns abuse exactly the kind of access get_blood_pressure 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_blood_pressure:
{
"version": "1",
"default": "deny",
"tools": {
"get_blood_pressure": {}
}
}get_blood_pressure is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get blood pressure readings over a date range. 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_blood_pressure: 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_blood_pressure 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_blood_pressure 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_blood_pressure. 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_blood_pressure 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.