add_subscription_rate_plan · Rebillia MCP Server MCP

WHAT IT DOES

What add_subscription_rate_plan does on Rebillia MCP Server

AI agents use add_subscription_rate_plan to create or update resources in Rebillia MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Rebillia MCP Server environment.

WHY IT NEEDS A POLICY

Why add_subscription_rate_plan needs a policy

This tool creates or modifies subscription billing structures reversibly (adds rate plans and charges to subscriptions). It does not delete data (would be Destructive), nor does it directly move money (Financial category applies to payment/refund operations). However, it modifies financial structures that affect future billing.

From the tool's definition Tool performs POST operation to add/modify a rate plan to a subscription: 'Add a rate plan to a subscription. POST /subscriptions/{subscriptionId}/rateplans'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_subscription_rate_plan Rate-limited

add_subscription_rate_plan stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_subscription_rate_plan": {
      "limits": [
        {
          "counter": "add_subscription_rate_plan_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Rebillia MCP Server, so you can run agents against it safely.

FAQ

Questions about add_subscription_rate_plan

What does the add_subscription_rate_plan tool do? +

Add a rate plan to a subscription. POST /subscriptions/{subscriptionId}/rateplans. Required: productRatePlanId (product rate plan to attach). Optional: name, type (contract|ongoing|prepaid), effectiveStartDate, changeStatusBasedOnCharge, ratePlanCharge (array of {quantity, optional productRatePlanChargeId, or name, chargeType, chargeTier, etc.). It is categorised as a Write tool in the Rebillia MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_subscription_rate_plan? +

Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for add_subscription_rate_plan: 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.

What risk level is add_subscription_rate_plan? +

add_subscription_rate_plan is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_subscription_rate_plan? +

Yes. Add a rate_limit block to the add_subscription_rate_plan 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.

How do I block add_subscription_rate_plan completely? +

Set action: deny in the PolicyLayer policy for add_subscription_rate_plan. 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.

What MCP server provides add_subscription_rate_plan? +

add_subscription_rate_plan 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.