listar_taxas_iva
AI agents call listar_taxas_iva to retrieve information from MCP Officegest without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The prefix 'listar' (list) strongly implies a read/query operation that retrieves VAT rate data without side effects. The description is empty, which reduces confidence, but the naming convention on this server appears consistent (other tools use action verbs like 'adicionar', 'anular', 'atualizar' for write/destructive operations). A listing tool for tax rates is unlikely to cause significant harm if misused.
From the tool's definition Tool name 'listar_taxas_iva' translates from Portuguese to 'list VAT rates' — 'listar' means 'to list' and 'taxas_iva' means 'VAT/tax rates'.
Attacks that exploit this kind of access
listar_taxas_iva. It is categorised as a Read tool in the MCP Officegest MCP Server, which means it retrieves data without modifying state.
Register the MCP Officegest MCP server in PolicyLayer and add a rule for listar_taxas_iva: 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 Officegest. Nothing to install.
listar_taxas_iva 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 listar_taxas_iva 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 listar_taxas_iva. 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.
listar_taxas_iva is provided by the MCP Officegest MCP server (rubencodex86/officegest-api-v2-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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