Validates a Mexican RFC (Registro Federal de Contribuyentes) — the tax identification number issued by the SAT (Servicio de Administración Tributaria). Validates format for both individuals (13 characters: 4 letters + 6 digit date + 3 alphanumeric homoclave) and companies (12 characters: 3 letter...
AI agents call validate_rfc_mx to retrieve information from Mcp Latam Business without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves validation status of tax identification data without side effects. It checks syntax/format against known RFC rules and returns a boolean result. No data is created, modified, deleted, or financial transactions are initiated. Classification as Read (query/validation operation) with low severity due to minimal blast radius if misused — a false validation result causes no irreversible harm.
From the tool's definition Tool name 'validate_rfc_mx' and description 'Validates a Mexican RFC' — performs format validation only. Returns {valid: boolean, type: ...} with no modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Validates a Mexican RFC (Registro Federal de Contribuyentes) — the tax identification number issued by the SAT (Servicio de Administración Tributaria). Validates format for both individuals (13 characters: 4 letters + 6 digit date + 3 alphanumeric homoclave) and companies (12 characters: 3 letters + 6 digit date + 3 alphanumeric homoclave). Returns { valid: boolean, type:. It is categorised as a Read tool in the Mcp Latam Business MCP Server, which means it retrieves data without modifying state.
Register the Mcp Latam Business MCP server in PolicyLayer and add a rule for validate_rfc_mx: 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 Latam Business. Nothing to install.
validate_rfc_mx 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_rfc_mx 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_rfc_mx. 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_rfc_mx is provided by the Mcp Latam Business MCP server (josemvelez78/mcp-latam-business). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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