Meals and water intake for the day: foods array, nutrition summary (calories/carbs/fat/fiber/protein/sodium/sugar), water total, and—when Fitbit has set one—a calorie goal. The
AI agents call get_food_log to retrieve information from Fitbit Googlehealth without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical food and water intake records along with nutritional summaries and calorie goals. It performs a query-only operation with no ability to modify, delete, or execute external actions. The severity is low because the data exposed is user health telemetry already logged in Fitbit, and exposure poses minimal direct harm compared to destructive or financial operations on this server.
From the tool's definition Tool name 'get_food_log' and description 'Meals and water intake for the day: foods array, nutrition summary...water total' indicate retrieval of logged nutritional data with no modification or side effects.
Attacks that exploit this kind of access
Meals and water intake for the day: foods array, nutrition summary (calories/carbs/fat/fiber/protein/sodium/sugar), water total, and—when Fitbit has set one—a calorie goal. The. It is categorised as a Read tool in the Fitbit Googlehealth MCP Server, which means it retrieves data without modifying state.
Register the Fitbit Googlehealth MCP server in PolicyLayer and add a rule for get_food_log: 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 Fitbit Googlehealth. Nothing to install.
get_food_log 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_food_log 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_food_log. 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_food_log is provided by the Fitbit Googlehealth MCP server (tachibanayu24/fitbit-googlehealth-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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