Upload an identity document image for an applicant. Sent as multipart/form-data. Pass file as base64-encoded bytes plus file_name and content_type (image/jpeg, image/png, application/pdf).
AI agents use upload_document to create or update resources in Mcp Ap2 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Ap2 environment.
This tool creates new document records in the system by uploading identity documents. While nominally a Write operation (reversible data creation), the context is concerning: (1) handles personally identifiable information (identity documents), (2) part of a payment/financial protocol server (AP2), (3) involves identity verification which has downstream financial authorization implications.
From the tool's definition Tool 'upload_document' performs file upload action ('Upload an identity document image') that creates/stores new data. Description explicitly states multipart/form-data transfer and file persistence mechanism.
Documented attack patterns abuse exactly the kind of access upload_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 upload_document:
{
"version": "1",
"default": "deny",
"tools": {
"upload_document": {
"limits": [
{
"counter": "upload_document_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}upload_document stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Upload an identity document image for an applicant. Sent as multipart/form-data. Pass file as base64-encoded bytes plus file_name and content_type (image/jpeg, image/png, application/pdf). It is categorised as a Write tool in the Mcp Ap2 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for upload_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.
upload_document 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 upload_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 upload_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.
upload_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.
Free to start. No card required.
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