Get the PDF representation of an invoice (returns URL or base64)
AI agents call get_invoice_pdf to retrieve information from Mcp Ap2 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns an existing invoice document in PDF format. It is a read-only query operation that accesses data without side effects, modification, or execution of commands. While the server handles payment-related functions (as evidenced by sibling tools like 'activate_subscription' and 'accept_dispute'), this specific tool merely fetches a document representation.
From the tool's definition Tool name is 'get_invoice_pdf' and description states it 'Get[s] the PDF representation of an invoice (returns URL or base64)' — a pure retrieval operation with no modification or financial transaction initiation.
Documented attack patterns abuse exactly the kind of access get_invoice_pdf gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for get_invoice_pdf:
{
"version": "1",
"default": "deny",
"tools": {
"get_invoice_pdf": {}
}
}get_invoice_pdf is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the PDF representation of an invoice (returns URL or base64). It is categorised as a Read tool in the Mcp Ap2 MCP Server, which means it retrieves data without modifying state.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for get_invoice_pdf: 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 Ap2. Nothing to install.
get_invoice_pdf 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 get_invoice_pdf 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 get_invoice_pdf. 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.
get_invoice_pdf is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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