Upload a new document to Paperless-NGX with metadata. Supports PDF, images (PNG/JPG/TIFF), and text files. Automatically processes for OCR and indexing.
AI agents use post_document to create or update resources in Paperless-NGX MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Paperless-NGX MCP Server environment.
This tool creates new documents in the system, which is a reversible write operation. While the upload itself persists data, it does not irreversibly delete or destroy data (not Destructive), does not execute arbitrary code (not Execute), and does not involve financial transactions (not Financial).
From the tool's definition Tool name is 'post_document' and description states 'Upload a new document to Paperless-NGX with metadata.' This is a create/write operation that adds new data to the system.
Documented attack patterns abuse exactly the kind of access post_document gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Paperless-NGX MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for post_document:
{
"version": "1",
"default": "deny",
"tools": {
"post_document": {
"limits": [
{
"counter": "post_document_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}post_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 a new document to Paperless-NGX with metadata. Supports PDF, images (PNG/JPG/TIFF), and text files. Automatically processes for OCR and indexing. It is categorised as a Write tool in the Paperless-NGX MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Paperless-NGX MCP Server MCP server in PolicyLayer and add a rule for post_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 Paperless-NGX MCP Server. Nothing to install.
post_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 post_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 post_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.
post_document is provided by the Paperless-NGX MCP Server MCP server (nloui/paperless-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 Paperless-NGX MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
16 Paperless-NGX MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.