extract_totals
AI agents call extract_totals to retrieve information from Invoice Parser MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Extract_totals retrieves and queries financial summary data (totals) from parsed invoices without modifying, deleting, or executing external operations. Although the server context involves financial documents, this specific tool performs read-only data extraction. Confidence is high despite empty description because the tool name and server purpose clearly indicate extraction (Read category).
From the tool's definition Tool is part of an 'Invoice Parser MCP' server that 'extract[s] structured JSON from invoices and receipts' with capabilities including 'full document parsing' and 'line item extraction'.
Attacks that exploit this kind of access
extract_totals. It is categorised as a Read tool in the Invoice Parser MCP MCP Server, which means it retrieves data without modifying state.
Register the Invoice Parser MCP server in PolicyLayer and add a rule for extract_totals: 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 Invoice Parser MCP. Nothing to install.
extract_totals 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 extract_totals 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 extract_totals. 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.
extract_totals is provided by the Invoice Parser MCP server (knportal/invoice-parser-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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