Get a spending report.
AI agents call cost_report to retrieve information from Agent Cost without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries cost/spending data without modifying, deleting, or executing any operations. It is purely informational and fits the Read category (retrieves or queries data; no side effects). The severity is low because accessing spending reports poses minimal risk—it does not allow modification of budgets, deletion of records, or execution of commands.
From the tool's definition Tool name is 'cost_report' and description states 'Get a spending report.' The verb 'Get' and the action of retrieving a report indicate a read-only operation with no side effects.
Attacks that exploit this kind of access
Get a spending report. It is categorised as a Read tool in the Agent Cost MCP Server, which means it retrieves data without modifying state.
Register the Agent Cost MCP server in PolicyLayer and add a rule for cost_report: 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 Agent Cost. Nothing to install.
cost_report 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 cost_report 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 cost_report. 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.
cost_report is provided by the Agent Cost MCP server (vanthienha199/agent-cost-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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →