get_trend_data_ch
AI agents call get_trend_data_ch to retrieve information from Apple Health MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to retrieve trend data from Apple Health records, consistent with the server's stated purpose of enabling 'query, analyze' operations. The name pattern (get_*) and comparison with sibling tools suggest this is a read-only query. The empty description reduces confidence slightly, but the consistent naming convention across the server strongly indicates a data retrieval function with no side effects.
From the tool's definition Tool name 'get_trend_data_ch' indicates data retrieval; sibling tools like 'get_health_summary_*', 'get_statistics_by_type_*', and 'get_trend_data_*' are all query/analysis operations.
Attacks that exploit this kind of access
get_trend_data_ch. It is categorised as a Read tool in the Apple Health MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Apple Health MCP Server MCP server in PolicyLayer and add a rule for get_trend_data_ch: 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 Apple Health MCP Server. Nothing to install.
get_trend_data_ch 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_trend_data_ch 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_trend_data_ch. 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_trend_data_ch is provided by the Apple Health MCP Server MCP server (the-momentum/apple-health-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.