AI agents call plex_get_recently_added to retrieve information from Nas without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves information about recently added media from a Plex library. It is a read-only operation with no capability to modify, delete, or execute code. The blast radius if misused by an AI agent is minimal—it only exposes metadata about library contents that the user already has access to through normal Plex usage.
From the tool's definition Tool name 'plex_get_recently_added' and description 'Récupère les médias récemment ajoutés à la bibliothèque' (Retrieves media recently added to the library) indicate a query operation that retrieves data without modification or side effects.
Attacks that exploit this kind of access
Récupère les médias récemment ajoutés à la bibliothèque. It is categorised as a Read tool in the Nas MCP Server, which means it retrieves data without modifying state.
Register the Nas MCP server in PolicyLayer and add a rule for plex_get_recently_added: 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 Nas. Nothing to install.
plex_get_recently_added 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 plex_get_recently_added 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 plex_get_recently_added. 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.
plex_get_recently_added is provided by the Nas MCP server (matthieurosset/nas-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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