// MCP TOOL REFERENCE

series_grab

ServerMediabox MCP
CategoryExecute

WHAT IT DOES

What series_grab does on Mediabox MCP

AI agents invoke series_grab to trigger actions in Mediabox MCP. 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.

THE RISK

High Risk

Why series_grab needs a policy

This tool triggers an external download operation (torrent) and also cancels existing downloads as a side effect. It initiates network/torrent activity and modifies the download queue — going beyond a simple write. The automatic cancellation of existing downloads adds a destructive side effect, but the primary action is executing an external torrent download operation, making Execute the best fit.

From the tool's definition 'Download a specific torrent release for a series episode. Automatically cancels any existing download for the same episode to avoid duplicates.'

Documented attack patterns abuse exactly the kind of access series_grab gives an agent:

POLICY

How to control series_grab

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_grab:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "series_grab": {
      "limits": [
        {
          "counter": "series_grab_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

series_grab 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.

Create a free account and register Mediabox MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Mediabox MCP tools

Destructive cancel_downloads Manage Sonarr/Radarr/qBittorrent download queues. NOT for PyLoad — use download_status act Destructive cleanup_server Clean up the server: remove Jellyfin cache, temp files, orphan downloads, ghost entries in Destructive movie_remove Remove a movie from Radarr Destructive series_remove Remove a series from Sonarr Destructive manage_files List, move, or delete files and folders. Paths starting with Execute download_direct Download a file from a direct URL (or YouTube/video site via yt-dlp) and optionally organi Execute download_status PyLoad download manager. Three actions: - status: shows PyLoad queue AND lists folders in Execute fix_subtitles Convert ASS/SSA subtitles to SRT in MKV files to prevent transcoding. Works on single file

All 30 Mediabox MCP tools →

Execute tools on other servers

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Go deeper

High-risk tools in Mediabox MCP → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about series_grab

What does the series_grab tool do? +

Download a specific torrent release for a series episode. Automatically cancels any existing download for the same episode to avoid duplicates. seriesId can be Sonarr ID or tvdbId — both auto-resolved. It is categorised as a Execute tool in the Mediabox MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on series_grab? +

Register the Mediabox MCP server in PolicyLayer and add a rule for series_grab: 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.

What risk level is series_grab? +

series_grab is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit series_grab? +

Yes. Add a rate_limit block to the series_grab 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.

How do I block series_grab completely? +

Set action: deny in the PolicyLayer policy for series_grab. 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.

What MCP server provides series_grab? +

series_grab 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.

Enforce policy on every Mediabox MCP tool call.

Start from Mediabox MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

30 Mediabox MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.