Get SpO2 (blood oxygen saturation) test results from Elixir biosensing. Available on devices with SpO2 measurement capability.
AI agents call get_spo2 to retrieve information from Polar MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool fetches historical SpO2 measurement data from a Polar fitness device via the AccessLink API. It is a read-only operation that queries existing health metrics without side effects. No data is created, modified, deleted, or executed. The low severity reflects that unauthorized access to personal health data, while privacy-sensitive, does not enable direct harm or financial impact through this tool alone.
From the tool's definition Tool name is 'get_spo2' and description states 'Get SpO2 (blood oxygen saturation) test results' — purely retrieves data with no modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Get SpO2 (blood oxygen saturation) test results from Elixir biosensing. Available on devices with SpO2 measurement capability. It is categorised as a Read tool in the Polar MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Polar MCP Server MCP server in PolicyLayer and add a rule for get_spo2: 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 Polar MCP Server. Nothing to install.
get_spo2 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_spo2 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_spo2. 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_spo2 is provided by the Polar MCP Server MCP server (nelsonnew/polar-mcp-server). 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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