Get body composition data for a single date or date range
AI agents call get_body_composition to retrieve information from Garmin MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves existing body composition data (such as weight, body fat percentage, muscle mass) from Garmin Connect for a specified date or range. It performs no create, modify, delete, or execute operations. The blast radius of misuse is minimal—an agent could only view sensitive health data, not alter it or trigger external actions. This is a straightforward Read operation.
From the tool's definition Tool name is 'get_body_composition' with description 'Get body composition data for a single date or date range'. The verb 'Get' and lack of any modification language clearly indicate a read/retrieval operation.
Attacks that exploit this kind of access
Get body composition data for a single date or date range. It is categorised as a Read tool in the Garmin MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Garmin MCP Server 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 MCP Server. 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 MCP Server MCP server (jbaker48/garmin-mcp). 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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