[FacturaHub] Update manual overrides or notes on a draft tax declaration.
AI agents use update_tax_declaration to create or update resources in FacturaHub MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FacturaHub MCP Server environment.
This tool modifies existing tax declaration data (overrides and notes) in a reversible manner, matching the Write category. It is rated high severity because tax declarations are regulatory and financial documents; an agent error could alter compliance records, trigger audits, or create liability.
From the tool's definition Updates manual overrides or notes on a draft tax declaration — modifying tax-related data that affects financial compliance and reporting.
Attacks that exploit this kind of access
[FacturaHub] Update manual overrides or notes on a draft tax declaration. It is categorised as a Write tool in the FacturaHub MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the FacturaHub MCP Server MCP server in PolicyLayer and add a rule for update_tax_declaration: 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 FacturaHub MCP Server. Nothing to install.
update_tax_declaration is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_tax_declaration 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 update_tax_declaration. 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.
update_tax_declaration is provided by the FacturaHub MCP Server MCP server (santy1422/facturahub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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