Retrieves AWS costs broken down by service for the specified date range.
AI agents call get_cost_by_service to retrieve information from AWS 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 cost data for reporting purposes without creating, modifying, deleting, or executing any infrastructure changes. While it accesses financial data (cost information), it does not move money, commit financial obligations, or trigger transactions—it merely reads historical cost metrics. The read-only nature of the server and the retrieval-only operation classify this as Read with low severity.
From the tool's definition Tool description states it 'Retrieves AWS costs broken down by service' with no modification or deletion capabilities. Server is explicitly described as 'read-only'. The verb 'Retrieves' indicates query/fetch behavior.
Attacks that exploit this kind of access
Retrieves AWS costs broken down by service for the specified date range. It is categorised as a Read tool in the AWS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AWS MCP Server MCP server in PolicyLayer and add a rule for get_cost_by_service: 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 AWS MCP Server. Nothing to install.
get_cost_by_service 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_cost_by_service 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_cost_by_service. 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_cost_by_service is provided by the AWS MCP Server MCP server (sergiosediq/aws-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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