find_similar

Find items semantically similar to a given item using AI embeddings. Useful for expanding research from a known relevant paper and discovering thematic clusters.

ServerZotero
CategoryRead

How to control find_similar ↓

WHAT IT DOES

What find_similar does on Zotero

AI agents call find_similar to retrieve information from Zotero without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why find_similar needs a policy

This tool reads and queries the Zotero database to find semantically similar items using AI embeddings. It retrieves information based on similarity metrics but does not create, modify, delete, or execute any external operations. The function is purely informational search/discovery, classifying it as a Read operation with low severity and minimal blast radius if misused by an agent.

From the tool's definition Tool description states 'Find items semantically similar' and 'discovering thematic clusters' — operations that retrieve/query existing data without modification. No create, update, delete, or execute operations are mentioned.

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

POLICY

How to control find_similar

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_similar": {}
  }
}

find_similar is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Zotero tools

Destructive delete_collection Delete a collection. WARNING: This is a destructive operation. By default, items in the co Write remove_items_from_collection Remove one or more items from a collection. Items are NOT deleted from the library, only r Write add_items_to_collection Add one or more items to a collection by their item keys. Write create_collection Create a new collection in the library. Optionally nest it under a parent collection. Write update_collection Rename or move an existing collection. Provide name to rename, parentCollection to move (e Write write_item Create a new Zotero item, re-parent existing attachments, or import a local file as an att Write write_metadata Update metadata fields on Zotero items (title, abstract, date, URL, DOI, creators, etc.). Write write_note Create or modify Zotero notes. Supports child notes (attached to items), standalone notes,

All 27 Zotero tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about find_similar

What does the find_similar tool do? +

Find items semantically similar to a given item using AI embeddings. Useful for expanding research from a known relevant paper and discovering thematic clusters. It is categorised as a Read tool in the Zotero MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_similar? +

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

What risk level is find_similar? +

find_similar is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit find_similar? +

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

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

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

Enforce policy on every Zotero tool call.

Start from Zotero, 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.

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