AI agents call get_on_deck to retrieve information from Plex without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about the user's viewing progress. It has no side effects, performs no modifications, executes no external operations, and cannot delete or move data. It is a straightforward data query matching the Read category definition.
From the tool's definition Tool description states 'Get in-progress / continue-watching items' — a retrieval operation. Server description explicitly states 'all read-only against your local Plex instance.' The tool queries viewing state without modification.
Attacks that exploit this kind of access
Get in-progress / continue-watching items with percent-watched progress. It is categorised as a Read tool in the Plex MCP Server, which means it retrieves data without modifying state.
Register the Plex MCP server in PolicyLayer and add a rule for get_on_deck: 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 Plex. Nothing to install.
get_on_deck 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 get_on_deck 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 get_on_deck. 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.
get_on_deck is provided by the Plex MCP server (x10send/plex-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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