Retrieves the custom dimensions and metrics defined for a GA4 property. Use this to discover what custom definitions are available before running reports.
AI agents call ga4_custom_dimensions_metrics to retrieve information from GA4 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a retrieval operation to list custom dimensions and metrics configuration. It has no capability to modify, delete, execute code, or trigger financial transactions. The sole purpose is to discover and display existing analytics configuration metadata, making it a straightforward Read operation with minimal risk even if misused by an AI agent.
From the tool's definition Tool description states 'Retrieves the custom dimensions and metrics defined for a GA4 property' and is explicitly framed as a discovery mechanism 'before running reports', indicating a query-only operation with no side effects.
Attacks that exploit this kind of access
Retrieves the custom dimensions and metrics defined for a GA4 property. Use this to discover what custom definitions are available before running reports. It is categorised as a Read tool in the GA4 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GA4 MCP Server MCP server in PolicyLayer and add a rule for ga4_custom_dimensions_metrics: 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 GA4 MCP Server. Nothing to install.
ga4_custom_dimensions_metrics 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 ga4_custom_dimensions_metrics 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 ga4_custom_dimensions_metrics. 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.
ga4_custom_dimensions_metrics is provided by the GA4 MCP Server MCP server (wonyoungseong/ga4-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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