restore_document · Ai Brain MCP: Risk & Policy

WHAT IT DOES

What restore_document does on Ai Brain

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

WHY IT NEEDS A POLICY

Why restore_document needs a policy

This tool recreates or modifies the state of a previously deleted document, making it accessible again. While it reverses a prior deletion (rather than creating new data), it is not itself destructive—it is a restorative write operation that changes document metadata/state.

From the tool's definition Tool description states 'Restore a soft-deleted document...back into its space', which reverses a deletion by modifying document state from deleted to active.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

restore_document Rate-limited

restore_document 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": {
    "restore_document": {
      "limits": [
        {
          "counter": "restore_document_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 Ai Brain, so you can run agents against it safely.

FAQ

Questions about restore_document

What does the restore_document tool do? +

Restore a soft-deleted document (from list_trash) back into its space. It is categorised as a Write tool in the Ai Brain MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on restore_document? +

Register the Ai Brain MCP server in PolicyLayer and add a rule for restore_document: 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 Ai Brain. Nothing to install.

What risk level is restore_document? +

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

Can I rate-limit restore_document? +

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

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

restore_document is provided by the Ai Brain MCP server (thejoshgriffith/ai-brain). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.