add_item · Mcp Zotero MCP: Risk & Policy

WHAT IT DOES

What add_item does on Mcp Zotero

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

WHY IT NEEDS A POLICY

Why add_item needs a policy

This tool creates new items within a Zotero library, a reversible write operation. It does not delete data (not Destructive), execute arbitrary code (not Execute), involve financial transactions (not Financial), or merely retrieve data (not Read).

From the tool's definition Tool description states 'Add an item to Zotero', which creates new data in the user's library. The optional file attachment capability further confirms data creation/modification intent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_item Rate-limited

add_item 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": {
    "add_item": {
      "limits": [
        {
          "counter": "add_item_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about add_item

What does the add_item tool do? +

Add an item to Zotero. Optionally attach files (best-effort). It is categorised as a Write tool in the Mcp Zotero 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_item? +

Register the Mcp Zotero MCP server in PolicyLayer and add a rule for add_item: 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 Mcp Zotero. Nothing to install.

What risk level is add_item? +

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

Can I rate-limit add_item? +

Yes. Add a rate_limit block to the add_item 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_item completely? +

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

add_item is provided by the Mcp Zotero MCP server (nealcaren/mcp-zotero). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.