Download the raw binary of an uploaded document. Returns the bytes as base64 plus content_type. Useful for re-viewing or re-processing after upload.
AI agents call download_document 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.
The tool merely fetches and returns previously uploaded document data in base64 format. It has no side effects, does not modify data, does not execute operations, and does not move money. While it operates in a financial payment protocol context (AP2), the tool itself is purely a read operation accessing stored documents.
From the tool's definition Tool description states 'Download the raw binary of an uploaded document. Returns the bytes as base64 plus content_type.' This is a retrieval operation with no modification, deletion, or execution of code.
Documented attack patterns abuse exactly the kind of access download_document 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 download_document:
{
"version": "1",
"default": "deny",
"tools": {
"download_document": {}
}
}download_document is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download the raw binary of an uploaded document. Returns the bytes as base64 plus content_type. Useful for re-viewing or re-processing after upload. 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 download_document: 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.
download_document 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 download_document 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 download_document. 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.
download_document 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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1300 Mcp Ap2 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.