steam_updateWorkshopItem · Steam MCP Server MCP

WHAT IT DOES

What steam_updateWorkshopItem does on Steam MCP Server

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

WHY IT NEEDS A POLICY

Why steam_updateWorkshopItem needs a policy

This tool creates or modifies data (metadata fields like title, description, visibility, tags) without permanently destroying it. The changes are reversible: metadata can be edited again or reverted. While it requires authentication (publisher API key with allowlisting), the blast radius is limited to workshop item metadata rather than financial transactions or irreversible deletions.

From the tool's definition Tool description states 'Update metadata for an existing Steam Workshop item (title, description, visibility, tags)' — these are reversible modifications to data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

steam_updateWorkshopItem Rate-limited

steam_updateWorkshopItem 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.

View as policy code

policy.json

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

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Steam MCP Server, so you can run agents against it safely.

FAQ

Questions about steam_updateWorkshopItem

What does the steam_updateWorkshopItem tool do? +

Update metadata for an existing Steam Workshop item (title, description, visibility, tags) via the partner API. Requires a publisher API key with server IP allowlisted. File content updates require the SDK. It is categorised as a Write tool in the Steam 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 steam_updateWorkshopItem? +

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

What risk level is steam_updateWorkshopItem? +

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

Can I rate-limit steam_updateWorkshopItem? +

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

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

steam_updateWorkshopItem is provided by the Steam MCP Server MCP server (tmhsdigital/steam-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.