get_cgm_data
AI agents call get_cgm_data to retrieve information from T1D Manager without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves real-time medical data (CGM readings) without side effects, placing it in the Read category. Severity is high because unauthorized access to glucose data could enable harmful medical advice or patient surveillance, despite the lack of reversible/irreversible modification.
From the tool's definition Tool name 'get_cgm_data' combined with server description indicating 'monitor real-time blood glucose from Dexcom Share' suggests retrieval of continuous glucose monitor data. No modification, deletion, or execution implied.
Attacks that exploit this kind of access
get_cgm_data. It is categorised as a Read tool in the T1D Manager MCP Server, which means it retrieves data without modifying state.
Register the T1D Manager MCP server in PolicyLayer and add a rule for get_cgm_data: 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 T1D Manager. Nothing to install.
get_cgm_data 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_cgm_data 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_cgm_data. 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_cgm_data is provided by the T1D Manager MCP server (junhyungkang/t1d-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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