Busca empresas por CEP. QUANDO USAR: - Quer empresas em uma regiao especifica - Prospeccao geografica localizada PARAMETROS: - cep: CEP de 8 digitos - cnae: Filtrar por CNAE (opcional) - situacao: Filtrar por situacao cadastral (padrao: 02=ativas) - limite: Quantidade maxima (padrao: 50)
AI agents call buscar_por_cep to retrieve information from MCP CNPJ Intelligence without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only search operation that retrieves and filters public company data from the Brazilian Federal Revenue database by postal code (CEP) and optional filters. It has no side effects, does not modify data, execute code, or trigger external operations.
From the tool's definition Tool description states 'Busca empresas por CEP' (Search companies by CEP). Parameters include 'cep', 'cnae', 'situacao', and 'limite' — all query filters with no mention of modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Busca empresas por CEP. QUANDO USAR: - Quer empresas em uma regiao especifica - Prospeccao geografica localizada PARAMETROS: - cep: CEP de 8 digitos - cnae: Filtrar por CNAE (opcional) - situacao: Filtrar por situacao cadastral (padrao: 02=ativas) - limite: Quantidade maxima (padrao: 50). It is categorised as a Read tool in the MCP CNPJ Intelligence MCP Server, which means it retrieves data without modifying state.
Register the MCP CNPJ Intelligence MCP server in PolicyLayer and add a rule for buscar_por_cep: 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 CNPJ Intelligence. Nothing to install.
buscar_por_cep 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 buscar_por_cep 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 buscar_por_cep. 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.
buscar_por_cep is provided by the MCP CNPJ Intelligence MCP server (raphaelmarra/mcp-cnpj-intelligence). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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