AI agents call prowlarr.indexer_stats to retrieve information from Arr Stack without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears designed to fetch statistical or status data about Prowlarr indexers (search providers). Such monitoring/reporting functions are characteristic of Read operations—they retrieve information without side effects. The empty description reduces confidence slightly, but the naming convention strongly suggests a non-destructive query.
From the tool's definition Tool name 'prowlarr.indexer_stats' indicates retrieval of statistics about indexers. The '_stats' suffix and 'indexer' context suggest a query operation that retrieves metrics or status information rather than modifying system state.
Attacks that exploit this kind of access
prowlarr.indexer_stats. It is categorised as a Read tool in the Arr Stack MCP Server, which means it retrieves data without modifying state.
Register the Arr Stack MCP server in PolicyLayer and add a rule for prowlarr.indexer_stats: 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 Stack. Nothing to install.
prowlarr.indexer_stats 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 prowlarr.indexer_stats 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 prowlarr.indexer_stats. 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.
prowlarr.indexer_stats is provided by the Arr Stack MCP server (new-usemame/arr-stack-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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