Check your ReceiptsAPI usage and remaining document quota for this month.
AI agents call check_usage to retrieve information from ReceiptsAPI 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 read-only operation to check account usage metrics and quota status. It retrieves informational data about the user's consumption of the ReceiptsAPI service but produces no side effects, modifications, or destructive actions. The low severity reflects the minimal security risk: disclosure of usage statistics poses negligible blast radius even if accessed by an unauthorized agent.
From the tool's definition Tool name 'check_usage' and description 'Check your ReceiptsAPI usage and remaining document quota for this month' indicate a query operation that retrieves usage statistics and quota information without modifying any data.
Attacks that exploit this kind of access
Check your ReceiptsAPI usage and remaining document quota for this month. It is categorised as a Read tool in the ReceiptsAPI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ReceiptsAPI MCP Server MCP server in PolicyLayer and add a rule for check_usage: 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 ReceiptsAPI MCP Server. Nothing to install.
check_usage 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 check_usage 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 check_usage. 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.
check_usage is provided by the ReceiptsAPI MCP Server MCP server (mail2vimal11-arch/receiptsapi-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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