AI agents invoke bazarr_download_subtitle to trigger actions in Arr Suite MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Downloading a subtitle triggers an external operation (fetching and storing a file from a remote source), which is an Execute-category action. It modifies the local filesystem by writing a new subtitle file, but the primary action is the triggered external fetch/download operation.
From the tool's definition 'Download a subtitle' — triggers an external download operation in Bazarr
Documented attack patterns abuse exactly the kind of access bazarr_download_subtitle 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 bazarr_download_subtitle:
{
"version": "1",
"default": "deny",
"tools": {
"bazarr_download_subtitle": {
"limits": [
{
"counter": "bazarr_download_subtitle_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}bazarr_download_subtitle stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Download a subtitle. It is categorised as a Execute tool in the Arr Suite MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Arr Suite MCP Server MCP server in PolicyLayer and add a rule for bazarr_download_subtitle: 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.
bazarr_download_subtitle is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the bazarr_download_subtitle 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 bazarr_download_subtitle. 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.
bazarr_download_subtitle 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.