create_daily_note · Mcp Obsidian MCP: Risk & Policy

WHAT IT DOES

What create_daily_note does on Mcp Obsidian

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

WHY IT NEEDS A POLICY

Why create_daily_note needs a policy

This tool creates new data (daily note files) in the Obsidian vault, making it a Write operation. It is reversible (notes can be deleted) and has a moderate blast radius—an agent could create numerous spurious notes cluttering the vault, but cannot delete existing data or cause financial harm.

From the tool's definition create_daily_note creates new notes for specified dates, modifying the vault structure by adding new files. The description explicitly states it 'Create[s] a daily note' with optional template application.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_daily_note Rate-limited

create_daily_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_daily_note": {
      "limits": [
        {
          "counter": "create_daily_note_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 Obsidian, so you can run agents against it safely.

FAQ

Questions about create_daily_note

What does the create_daily_note tool do? +

Create a daily note for a given date, using a daily template if available. It is categorised as a Write tool in the Mcp Obsidian MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_daily_note? +

Register the Mcp Obsidian MCP server in PolicyLayer and add a rule for create_daily_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 Mcp Obsidian. Nothing to install.

What risk level is create_daily_note? +

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

Can I rate-limit create_daily_note? +

Yes. Add a rate_limit block to the create_daily_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.

How do I block create_daily_note completely? +

Set action: deny in the PolicyLayer policy for create_daily_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.

What MCP server provides create_daily_note? +

create_daily_note is provided by the Mcp Obsidian MCP server (jkang8/mcp-obsidian). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.