Get body composition data over a date range: weight, BMI, body fat %, muscle mass, bone mass, body water %
AI agents call get_body_composition 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 metrics from Garmin Connect without creating, modifying, or deleting any data. It has no side effects beyond returning requested information. While the data is personal health information, the tool itself performs only a read operation. Severity is low because misuse would only expose existing data rather than cause operational or financial harm.
From the tool's definition Tool name 'get_body_composition' and description 'Get body composition data over a date range' clearly indicates a retrieval operation with no modifications.
Documented attack patterns abuse exactly the kind of access get_body_composition 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_body_composition:
{
"version": "1",
"default": "deny",
"tools": {
"get_body_composition": {}
}
}get_body_composition is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get body composition data over a date range: weight, BMI, body fat %, muscle mass, bone mass, body water %. 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_body_composition: 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_body_composition 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_body_composition 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_body_composition. 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_body_composition 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.
Free to start. No card required.
97 Garmin Connect tools catalogued and risk-classified — across an index of 42,500+ MCP servers.