Calculate shipping rates. POST /shipping/calculate. Required: companyCurrencyId, fromZip, fromCountry, zip, country, weight, orderAmount, itemCount. Optional: residential, street1, street2, city, state, services, packagingType.
AI agents call calculate_shipping 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 tool performs a calculation and returns shipping rate information based on input parameters. It has no side effects—it does not charge customers, modify billing records, create orders, or alter any persistent state. The use of POST is for submitting calculation parameters, a common pattern for read-only queries.
From the tool's definition Tool name 'calculate_shipping' and description indicate it retrieves/calculates shipping rates via POST /shipping/calculate. The POST method is used for query purposes (providing calculation inputs), not for creating, modifying, or deleting data.
Attacks that exploit this kind of access
Calculate shipping rates. POST /shipping/calculate. Required: companyCurrencyId, fromZip, fromCountry, zip, country, weight, orderAmount, itemCount. Optional: residential, street1, street2, city, state, services, packagingType. 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 calculate_shipping: 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.
calculate_shipping 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 calculate_shipping 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 calculate_shipping. 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.
calculate_shipping 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.
Teams ship this data inside their own products. See what a licence covers →