palace_revert · Obsidian Palace MCP: Risk & Policy

WHAT IT DOES

What palace_revert does on Obsidian Palace MCP

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

WHY IT NEEDS A POLICY

Why palace_revert needs a policy

Reverting to a previous version modifies the current note content, which is a write operation. It is not fully destructive because it creates a backup by default and restores from history rather than permanently deleting data. The blast radius is medium since misuse could overwrite current note content, but the backup mechanism provides a recovery path.

From the tool's definition Restore a note to a previous version... Creates backup before reverting by default.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

palace_revert Rate-limited

palace_revert 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": {
    "palace_revert": {
      "limits": [
        {
          "counter": "palace_revert_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 Palace MCP, so you can run agents against it safely.

FAQ

Questions about palace_revert

What does the palace_revert tool do? +

Restore a note to a previous version. Can revert all content, frontmatter only, or content only. Creates backup before reverting by default. It is categorised as a Write tool in the Obsidian Palace MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on palace_revert? +

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

What risk level is palace_revert? +

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

Can I rate-limit palace_revert? +

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

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

palace_revert is provided by the Obsidian Palace MCP server (probably-computers/obsidian-palace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.