Get the most recent activity.
AI agents call get_last_activity to retrieve information from Mcp Garmin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves activity data with no side effects. The server is read-only, and the operation is a simple data retrieval. No creation, modification, deletion, or execution occurs. Severity is low as exposure of personal health activity data has limited security impact compared to financial or destructive operations.
From the tool's definition Server description explicitly states 'read-only access' and tool retrieves 'the most recent activity' from historical health data without modification.
Attacks that exploit this kind of access
Get the most recent activity. It is categorised as a Read tool in the Mcp Garmin MCP Server, which means it retrieves data without modifying state.
Register the Mcp Garmin MCP server in PolicyLayer and add a rule for get_last_activity: 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 Mcp Garmin. Nothing to install.
get_last_activity 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_last_activity 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_last_activity. 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_last_activity is provided by the Mcp Garmin MCP server (obrien-matthew/mcp-garmin). 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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