List all Markdown (.md) files directly inside /Notes (not in subfolders).
AI agents call list_uncategorized_notes to retrieve information from Nextcloud Notes 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 information about notes stored in a specific directory without modifying, deleting, or executing any operations. It is a straightforward data query with no destructive, write, or execution capabilities. The blast radius of misuse is minimal—an AI agent would only receive a list of file names, causing no harm.
From the tool's definition Tool name and description indicate a query operation: 'List all Markdown (.md) files directly inside /Notes'.
Attacks that exploit this kind of access
List all Markdown (.md) files directly inside /Notes (not in subfolders). It is categorised as a Read tool in the Nextcloud Notes MCP Server, which means it retrieves data without modifying state.
Register the Nextcloud Notes MCP server in PolicyLayer and add a rule for list_uncategorized_notes: 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 Nextcloud Notes. Nothing to install.
list_uncategorized_notes 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_uncategorized_notes 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_uncategorized_notes. 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_uncategorized_notes is provided by the Nextcloud Notes MCP server (rncz/nextcloud-notes-mcp-server). 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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