Create a new note in TriliumNext with duplicate title detection. When a note with the same title already exists in the same directory, you
AI agents use create_note to create or update resources in TriliumNext Notes' MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your TriliumNext Notes' MCP Server environment.
The tool creates new data (notes) without permanently destroying anything. Creation is a Write-category operation. Severity is low because note creation has minimal blast radius — notes can be easily deleted or modified if an AI agent creates unwanted notes. The incomplete description mentions 'duplicate title detection' but does not materially change the risk classification.
From the tool's definition Tool name 'create_note' and description states 'Create a new note in TriliumNext' — this is a reversible creation operation.
Documented attack patterns abuse exactly the kind of access create_note gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and TriliumNext Notes' MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_note:
{
"version": "1",
"default": "deny",
"tools": {
"create_note": {
"limits": [
{
"counter": "create_note_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_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 a new note in TriliumNext with duplicate title detection. When a note with the same title already exists in the same directory, you. It is categorised as a Write tool in the TriliumNext Notes' MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the TriliumNext Notes' MCP Server MCP server in PolicyLayer and add a rule for create_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 TriliumNext Notes' MCP Server. Nothing to install.
create_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 create_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 create_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.
create_note is provided by the TriliumNext Notes' MCP Server MCP server (tan-yong-sheng/triliumnext-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 TriliumNext Notes' MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
11 TriliumNext Notes' MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.