Validate up to 100 IBANs in a single call with the same enrichment as validate_iban, at 60% lower cost per IBAN. When to use: processing a CSV of supplier bank accounts, validating a payment batch before submission, running KYC checks on a customer list, or auditing an accounts-payable file. When...
Part of the Ibanforge server.
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AI agents call batch_validate_iban to retrieve information from Ibanforge without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though batch_validate_iban only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"batch_validate_iban": {}
}
}See the full Ibanforge policy for all 5 tools.
These attack patterns abuse exactly the kind of access batch_validate_iban gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Validate up to 100 IBANs in a single call with the same enrichment as validate_iban, at 60% lower cost per IBAN. When to use: processing a CSV of supplier bank accounts, validating a payment batch before submission, running KYC checks on a customer list, or auditing an accounts-payable file. When NOT to use: for a single IBAN, use validate_iban instead. For compliance/sanctions screening, use check_compliance on each IBAN. Behavior: this tool is read-only with no side effects. It validates each IBAN independently using the same logic as validate_iban (mod-97 checksum, BBAN parsing, BIC resolution, issuer classification). Results are returned in the same order as the input array. If one IBAN is invalid, the others are still processed — there is no short-circuit on error. Response time scales linearly: ~30ms per IBAN. Returns a JSON array. Input constraints: minimum 1 IBAN, maximum 100 IBANs per call. Exceeding 100 returns a validation error. Returns: Array of objects, each identical in structure to the validate_iban response: { valid, country, bban, bic, sepa, issuer, risk_indicators } Example: input ['DE89370400440532013000', 'INVALID123'] → [{ valid: true, ... }, { valid: false, error: 'Invalid checksum' }] Cost: $0.002 USDC per IBAN (e.g., 10 IBANs = $0.020, 50 IBANs = $0.100, 100 IBANs = $0.200).. It is categorised as a Read tool in the Ibanforge MCP Server, which means it retrieves data without modifying state.
Register the Ibanforge MCP server in PolicyLayer and add a rule for batch_validate_iban: 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 Ibanforge. Nothing to install.
batch_validate_iban 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 batch_validate_iban 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 batch_validate_iban. 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.
batch_validate_iban is provided by the Ibanforge MCP server (ibanforge-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 Ibanforge tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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