Create or modify Zotero notes. Supports child notes (attached to items), standalone notes, updating, or appending. Markdown is auto-converted to HTML. Confirm with user before writing.
AI agents use write_note to create or update resources in Zotero — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Zotero environment.
The tool creates or modifies notes in Zotero, which are data structures that can be edited or deleted later (reversible operations). This fits the Write category definition: 'creates or modifies data reversibly.' While notes are generally lower-impact than system configuration, they represent user-controlled content that could be modified unexpectedly by an agent.
From the tool's definition Tool description explicitly states 'Create or modify Zotero notes' and mentions 'updating, or appending' operations. These are reversible write operations that modify user data.
Documented attack patterns abuse exactly the kind of access write_note gives an agent:
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 write_note:
{
"version": "1",
"default": "deny",
"tools": {
"write_note": {
"limits": [
{
"counter": "write_note_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}write_note 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.
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Create or modify Zotero notes. Supports child notes (attached to items), standalone notes, updating, or appending. Markdown is auto-converted to HTML. Confirm with user before writing. It is categorised as a Write tool in the Zotero MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Zotero MCP server in PolicyLayer and add a rule for write_note: 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.
write_note is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the write_note 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.
Set action: deny in the PolicyLayer policy for write_note. 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.
write_note 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.
Start from Zotero, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
27 Zotero tools catalogued and risk-classified — across an index of 43,000+ MCP servers.