Sleep-derived breathing rate per day, broken down by sleep stage when available. Cached 1h.
AI agents call get_respiratory_rate 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 only retrieves historical health metrics (respiratory rate data) from the user's Fitbit/Google Health account. It has no side effects, does not modify data, execute commands, delete information, or move money. While it accesses sensitive health data, the blast radius of misuse is limited to exposing personal health information already owned by the authorized account.
From the tool's definition Tool name is 'get_respiratory_rate' with description indicating it 'retrieves' sleep-derived breathing rate data with caching, and the verb 'get' indicates data retrieval without modification.
Attacks that exploit this kind of access
Sleep-derived breathing rate per day, broken down by sleep stage when available. 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_respiratory_rate: 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_respiratory_rate 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_respiratory_rate 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_respiratory_rate. 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_respiratory_rate 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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