Validate an IBAN (International Bank Account Number) with full ISO 13616 checks: country-specific length + ISO 7064 mod-97 checksum, not just regex. Returns valid flag, normalized + 4-char-grouped form, country, check digits, and BBAN. Deterministic, ~85 countries — validate AND canonicalize bank...
AI agents call validate.iban to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and validates existing bank account data without creating, modifying, deleting, or executing financial transactions. It is purely informational—it checks format compliance and returns parsed components. While it operates in a financial domain (IBANs are banking identifiers), the tool itself performs no financial operations, fund movements, or irreversible changes.
From the tool's definition Tool performs validation and canonicalization of IBAN data: 'Validate an IBAN...Returns valid flag, normalized + 4-char-grouped form, country, check digits, and BBAN.' No modification, deletion, or financial transactions occur; it only queries and returns…
Attacks that exploit this kind of access
Validate an IBAN (International Bank Account Number) with full ISO 13616 checks: country-specific length + ISO 7064 mod-97 checksum, not just regex. Returns valid flag, normalized + 4-char-grouped form, country, check digits, and BBAN. Deterministic, ~85 countries — validate AND canonicalize bank details in one call instead of doing checksum math in an LLM. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for 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 Mcp. Nothing to install.
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 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 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.
validate.iban is provided by the MCP server (@2sio/mcp). 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.
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