Retrieve all available document types for categorizing documents by purpose or format (Invoice, Receipt, Contract, etc.). Returns names and automatic matching rules.
AI agents call list_document_types to retrieve information from Paperless-NGX MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns metadata about document types without creating, modifying, deleting, or executing any operations. It is a straightforward read operation on existing configuration/reference data, presenting minimal risk if misused by an AI agent.
From the tool's definition Tool description explicitly states it 'Retrieve[s] all available document types' and 'Returns names and automatic matching rules' — pure data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Retrieve all available document types for categorizing documents by purpose or format (Invoice, Receipt, Contract, etc.). Returns names and automatic matching rules. It is categorised as a Read tool in the Paperless-NGX MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Paperless-NGX MCP Server MCP server in PolicyLayer and add a rule for list_document_types: 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.
list_document_types 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 list_document_types 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 list_document_types. 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.
list_document_types is provided by the Paperless-NGX MCP Server MCP server (mephistojb/paperless-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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