edit_custom_field

Set a custom field value on a release in your Discogs collection. Use list_custom_fields to see available fields and their IDs. For dropdown fields, the value must match one of the defined options.

ServerDiscogs MCP Server
CategoryWrite

How to control edit_custom_field ↓

WHAT IT DOES

What edit_custom_field does on Discogs MCP Server

AI agents use edit_custom_field to create or update resources in Discogs MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Discogs MCP Server environment.

THE RISK

Medium Risk

Why edit_custom_field needs a policy

This tool modifies metadata on a release record (setting custom field values) but does not delete, execute code, move money, or trigger external operations. It is a straightforward Write operation on user collection data with low blast radius since field edits are easily undone.

From the tool's definition Tool name 'edit_custom_field' and description 'Set a custom field value on a release' indicate data modification. The action is reversible—custom field values can be changed or cleared later.

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

POLICY

How to control edit_custom_field

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 edit_custom_field:

policy.json

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

edit_custom_field 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 →

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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 add_to_collection Add a release to a folder in your Discogs collection. If no folder is specified, adds to t Write create_folder Create a new folder in your Discogs collection for organizing releases. 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

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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 edit_custom_field

What does the edit_custom_field tool do? +

Set a custom field value on a release in your Discogs collection. Use list_custom_fields to see available fields and their IDs. For dropdown fields, the value must match one of the defined options. 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 edit_custom_field? +

Register the Discogs MCP Server MCP server in PolicyLayer and add a rule for edit_custom_field: 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 edit_custom_field? +

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

Can I rate-limit edit_custom_field? +

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

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

edit_custom_field 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 →

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20 Discogs MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.