AI agents call radarr_list_path_mappings to retrieve information from Homelab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns path mapping information from Radarr, a media management application. It performs a read-only operation with no side effects, no data modification, and no execution of external commands. The blast radius of misuse is minimal—an attacker gains insight into how paths are configured but cannot modify, delete, or execute anything.
From the tool's definition Tool name contains 'list' and description states 'List remote path mappings' — it retrieves and displays configuration data without modification.
Attacks that exploit this kind of access
List remote path mappings in Radarr (translates download client paths to Radarr paths). It is categorised as a Read tool in the Homelab MCP Server, which means it retrieves data without modifying state.
Register the Homelab MCP server in PolicyLayer and add a rule for radarr_list_path_mappings: 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 Homelab. Nothing to install.
radarr_list_path_mappings 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 radarr_list_path_mappings 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 radarr_list_path_mappings. 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.
radarr_list_path_mappings is provided by the Homelab MCP server (nainounen/homelab-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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