Lista empresas de um SETOR especifico (por CNAE). QUANDO USAR: - Quer todas empresas de uma atividade economica - Prospeccao por vertical/segmento CNAES COMUNS: - 4711302: Supermercados - 5611201: Restaurantes - 2222600: Embalagens plasticas - 4751201: Comercio de informatica
AI agents call buscar_por_cnae 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 pure data retrieval tool that queries a database of 27 million Brazilian companies by industry sector code. It lists existing data without side effects, modifications, deletions, or external execution. The use cases explicitly mention prospecting and searches, which are read-only operations.
From the tool's definition Tool name 'buscar_por_cnae' and description 'Lista empresas de um SETOR especifico' (Lists companies from a specific sector).
Attacks that exploit this kind of access
Lista empresas de um SETOR especifico (por CNAE). QUANDO USAR: - Quer todas empresas de uma atividade economica - Prospeccao por vertical/segmento CNAES COMUNS: - 4711302: Supermercados - 5611201: Restaurantes - 2222600: Embalagens plasticas - 4751201: Comercio de informatica. 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_cnae: 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_cnae 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_cnae 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_cnae. 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_cnae 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →