vat_calculator
Add VAT to a net amount or remove it from a gross amount. Runs on smart-tools.xyz.
This record as markdown: /tools/io-github-9thshini-smart-tools/vat-calculator.md
What vat_calculator does on SmartTools
AI agents call vat_calculator to permanently remove resources in SmartTools, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
| Parameter | Type | Required | Description |
|---|---|---|---|
rate | number | string | Yes | VAT rate, percent |
amount | number | string | Yes | The amount |
locale | string | — | Language for the source_url link (default en) |
direction | string | — | add: amount is net → gross; remove: amount is gross → net (default add) |
Parameters from the server's own tool schema.
Why vat_calculator is rated Critical
An AI agent that decides to call vat_calculator doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from SmartTools is gone. There is no undo for destructive operations.
Attacks that exploit this kind of access
The rule that runs vat_calculator safely
PolicyLayer is an MCP gateway: it sits between your AI agents and SmartTools, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For vat_calculator, this is the rule to start with:
vat_calculator is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect SmartTools, apply this rule, and every vat_calculator call is checked against it from then on.
Questions about vat_calculator
Add VAT to a net amount or remove it from a gross amount. Runs on smart-tools.xyz. It is categorised as a Destructive tool in the SmartTools MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
vat_calculator accepts 4 parameters: rate, amount, locale, direction. Required: rate, amount. The full parameter table on this page comes from the server's own tool schema.
Register the SmartTools MCP server in PolicyLayer and add a rule for vat_calculator: 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 SmartTools. Nothing to install.
vat_calculator is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the vat_calculator 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 vat_calculator. 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.
vat_calculator is provided by the SmartTools MCP server (https://smart-tools.xyz/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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