AI agents call plex_get_libraries to retrieve information from Arr Suite MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists Plex library metadata without creating, modifying, deleting, or executing any operations. It is a simple read-only query operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'plex_get_libraries' and description 'Get all Plex libraries' indicate a retrieval operation with no modification or execution of code.
Documented attack patterns abuse exactly the kind of access plex_get_libraries gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Arr Suite MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for plex_get_libraries:
{
"version": "1",
"default": "deny",
"tools": {
"plex_get_libraries": {}
}
}plex_get_libraries is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all Plex libraries. It is categorised as a Read tool in the Arr Suite MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Arr Suite MCP Server MCP server in PolicyLayer and add a rule for plex_get_libraries: 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 Arr Suite MCP Server. Nothing to install.
plex_get_libraries 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_libraries 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_libraries. 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_libraries is provided by the Arr Suite MCP Server MCP server (shaktech786/arr-suite-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Arr Suite MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
25 Arr Suite MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.