Daily values of one activity metric across a date range. Useful for trending steps, distance, calories. Cached 1h.
AI agents call get_activity_timeseries 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 and queries time-series activity data from Fitbit without performing any side effects, modifications, or irreversible actions. It is a straightforward data retrieval operation (get) that allows trending analysis of metrics like steps, distance, and calories. The 1-hour caching confirms it is a passive read operation.
From the tool's definition Tool name 'get_activity_timeseries' and description 'Daily values of one activity metric across a date range. Useful for trending steps, distance, calories' indicates read-only retrieval of historical health data with no modification or deletion capabilities.
Attacks that exploit this kind of access
Daily values of one activity metric across a date range. Useful for trending steps, distance, calories. Cached 1h. 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_activity_timeseries: 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_activity_timeseries 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_timeseries 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_timeseries. 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_timeseries 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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