AI agents use series_import to create or update resources in Mediabox MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mediabox MCP environment.
Importing media into a library is a reversible write operation—it adds/modifies entries in Sonarr's database and file organization. This is not destructive (data can be removed or re-imported), not execute (doesn't run arbitrary code based on user input), and not financial. Medium severity because misconfiguration could clutter the library or import unwanted content, but changes are correctable.
From the tool's definition Tool name 'series_import' and description 'Import manual downloads into Sonarr library' indicates the tool creates or modifies library metadata and organization by importing series data into Sonarr, a media management system.
Documented attack patterns abuse exactly the kind of access series_import gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mediabox MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for series_import:
{
"version": "1",
"default": "deny",
"tools": {
"series_import": {
"limits": [
{
"counter": "series_import_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}series_import stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Import manual downloads into Sonarr library. action=. It is categorised as a Write tool in the Mediabox MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mediabox MCP server in PolicyLayer and add a rule for series_import: 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 Mediabox MCP. Nothing to install.
series_import is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the series_import 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 series_import. 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.
series_import is provided by the Mediabox MCP server (juancmpdev/mediabox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mediabox MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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30 Mediabox MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.