obsidian_remove_property · Obsidian MCP: Risk & Policy

WHAT IT DOES

What obsidian_remove_property does on Obsidian

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

WHY IT NEEDS A POLICY

Why obsidian_remove_property needs a policy

This tool modifies a note by deleting a specific frontmatter property. While it removes data, frontmatter properties are metadata fields and the underlying note content remains intact. The action is reversible in principle (the property could be re-added), so this is best categorized as Write rather than Destructive.

From the tool's definition Removes a frontmatter property from a note

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

obsidian_remove_property Rate-limited

obsidian_remove_property 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": {
    "obsidian_remove_property": {
      "limits": [
        {
          "counter": "obsidian_remove_property_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 Obsidian, so you can run agents against it safely.

FAQ

Questions about obsidian_remove_property

What does the obsidian_remove_property tool do? +

Removes a frontmatter property from a note. It is categorised as a Write tool in the 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 obsidian_remove_property? +

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

What risk level is obsidian_remove_property? +

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

Can I rate-limit obsidian_remove_property? +

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

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

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