Pick a single statutory tax-rate slab — either by exact id (e.g. IN-standard-18, GB-zero-0, CA-hst-13-on) for a deterministic lookup, or by country + free-text category (e.g. "office supplies", "restaurant", "exports", "domestic fuel") for a fuzzy best-match. Returns the matched rate, the match s...
AI agents call lookup_tax_rate to retrieve information from HelloBooks AI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
id | string | — | Exact rate id, e.g. ``IN-standard-18`` or ``GB-zero-0``. When set, country/category are ignored. |
country | string | — | Country to search within. Required when ``id`` is not provided. |
category | string | — | Free-text query — "office supplies", "restaurant", "exports", "domestic fuel". |
Parameters from the server's own tool schema.
This tool retrieves and queries publicly available tax rate information without side effects. It does not create, modify, delete, execute code, or commit financial obligations. The lookup is deterministic (by ID) or a fuzzy match on categorical metadata.
From the tool's definition lookup_tax_rate performs lookups of public statutory tax-rate data by country and category, returning matched rates and source URLs with no modification, deletion, or financial transaction capability.
Attacks that exploit this kind of access
Pick a single statutory tax-rate slab — either by exact id (e.g. IN-standard-18, GB-zero-0, CA-hst-13-on) for a deterministic lookup, or by country + free-text category (e.g. "office supplies", "restaurant", "exports", "domestic fuel") for a fuzzy best-match. Returns the matched rate, the match score, and the authoritative source URL. Use this when a user asks "what slab does X fall into in India?" or "what VAT rate applies to children's car seats?". For broader exploration (all slabs in a country / all rates of one scheme), use list_tax_rates. No customer data — public statutory reference only. It is categorised as a Read tool in the HelloBooks AI MCP Server MCP Server, which means it retrieves data without modifying state.
lookup_tax_rate accepts 3 parameters: id, country, category. The full parameter table on this page comes from the server's own tool schema.
Register the HelloBooks AI MCP Server MCP server in PolicyLayer and add a rule for lookup_tax_rate: 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 HelloBooks AI MCP Server. Nothing to install.
lookup_tax_rate 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 lookup_tax_rate 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 lookup_tax_rate. 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.
lookup_tax_rate is provided by the HelloBooks AI MCP Server MCP server (Meru-Fin-Tech/HelloBooks-MCP-Public). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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