query_metric_aggregates
AI agents call query_metric_aggregates to retrieve information from Klaviyo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The name strongly suggests querying and aggregating metrics for reporting/analytics purposes—a retrieval operation with no side effects. The empty description lowers confidence slightly, but 'query' combined with 'aggregates' indicates a Read operation rather than Write, Execute, or Destructive. Consistent with other marketing automation tools that expose metric/analytics endpoints as read-only.
From the tool's definition Tool name 'query_metric_aggregates' contains 'query' which indicates data retrieval. The 'aggregates' suffix suggests it computes summaries of metrics rather than modifying state.
Attacks that exploit this kind of access
query_metric_aggregates. It is categorised as a Read tool in the Klaviyo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Klaviyo MCP Server MCP server in PolicyLayer and add a rule for query_metric_aggregates: 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 Klaviyo MCP Server. Nothing to install.
query_metric_aggregates 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 query_metric_aggregates 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 query_metric_aggregates. 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.
query_metric_aggregates is provided by the Klaviyo MCP Server MCP server (ivan-rivera-projects/klaviyo-mcp-server-enhanced). 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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