add_to_collection

THE RISK

Medium Risk

Why add_to_collection needs a policy

This tool creates a new entry in the user's Discogs collection by adding a release to a folder. This is a reversible modification (the sibling tool delete_folder and the presence of edit operations indicate collection state can be modified back), so it falls under Write rather than Destructive. Severity is medium because misuse could clutter or pollute the user's music collection, but the action is reversible.

From the tool's definition Tool description states 'Add a release to a folder in your Discogs collection.' The verb 'Add' and action of placing a release into a collection folder constitutes creating/modifying collection data.

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

POLICY

How to control add_to_collection

PolicyLayer is an MCP gateway — it sits between your AI agents and Discogs MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for add_to_collection:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_to_collection": {
      "limits": [
        {
          "counter": "add_to_collection_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

add_to_collection 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.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Discogs MCP Server tools

Destructive delete_folder Delete a folder from your Discogs collection. The folder must be empty (no releases). Cann Destructive remove_from_collection Remove a specific release instance from a folder in your Discogs collection. Use search_co Execute refresh_collection Force an immediate full refresh of the cached collection snapshot. Use after adding or rem Write rate_release Rate a release in your Discogs collection from 0 (no rating) to 5 stars. Use search_collec Write create_folder Create a new folder in your Discogs collection for organizing releases. Write edit_custom_field Set a custom field value on a release in your Discogs collection. Use list_custom_fields t Write edit_folder Rename an existing folder in your Discogs collection. Cannot rename the system folders (Al Write move_release Move a release instance to a different folder in your Discogs collection. Use search_colle

All 20 Discogs MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about add_to_collection

What does the add_to_collection tool do? +

Add a release to a folder in your Discogs collection. If no folder is specified, adds to the Uncategorized folder (ID 1). It is categorised as a Write tool in the Discogs MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_to_collection? +

Register the Discogs MCP Server MCP server in PolicyLayer and add a rule for add_to_collection: 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 Discogs MCP Server. Nothing to install.

What risk level is add_to_collection? +

add_to_collection is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_to_collection? +

Yes. Add a rate_limit block to the add_to_collection 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 add_to_collection completely? +

Set action: deny in the PolicyLayer policy for add_to_collection. 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 add_to_collection? +

add_to_collection is provided by the Discogs MCP Server MCP server (rianvdm/discogs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Discogs MCP Server tool call.

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

CHECK YOUR STACK →