View all upcoming charges for a subscription. GET /subscriptions/{subscriptionId}/upcoming. Returns scheduled charges (recurring, one-time, usage) with amounts and dates. Optional: include.
AI agents call get_subscription_upcoming_charges to retrieve information from Rebillia MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that retrieves and displays subscription billing information without creating, modifying, deleting, or executing any operations. It has minimal security risk as it only queries existing data. The severity is low because viewing upcoming charges poses no direct harm even if exposed to an AI agent.
From the tool's definition Tool name 'get_subscription_upcoming_charges' and description 'View all upcoming charges' with GET method indicates data retrieval with no modification. Returns read-only information about scheduled charges, amounts, and dates.
Attacks that exploit this kind of access
View all upcoming charges for a subscription. GET /subscriptions/{subscriptionId}/upcoming. Returns scheduled charges (recurring, one-time, usage) with amounts and dates. Optional: include. It is categorised as a Read tool in the Rebillia MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for get_subscription_upcoming_charges: 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 Rebillia MCP Server. Nothing to install.
get_subscription_upcoming_charges 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_subscription_upcoming_charges 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_subscription_upcoming_charges. 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_subscription_upcoming_charges is provided by the Rebillia MCP Server MCP server (rhinosaas/rebillia-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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