Get detailed cost breakdown by Google Cloud service with usage and SKU information
AI agents call gcp-billing-service-breakdown to retrieve information from GCP Billing and Monitoring MCP Server 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 billing cost breakdown data from GCP. While it accesses financial data (justifying medium severity due to potential information disclosure), it performs no write, execute, destructive, or financial transaction operations.
From the tool's definition Tool name includes 'get' action concept and description states 'Get detailed cost breakdown' - retrieves billing data without modifying it. Returns usage and SKU information for analysis purposes.
Attacks that exploit this kind of access
Get detailed cost breakdown by Google Cloud service with usage and SKU information. It is categorised as a Read tool in the GCP Billing and Monitoring MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GCP Billing and Monitoring MCP Server MCP server in PolicyLayer and add a rule for gcp-billing-service-breakdown: 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 GCP Billing and Monitoring MCP Server. Nothing to install.
gcp-billing-service-breakdown 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 gcp-billing-service-breakdown 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 gcp-billing-service-breakdown. 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.
gcp-billing-service-breakdown is provided by the GCP Billing and Monitoring MCP Server MCP server (radiumgu/gcp-billing-and-monitoring-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.
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