reindex_document · Ai Brain MCP: Risk & Policy

WHAT IT DOES

What reindex_document does on Ai Brain

AI agents invoke reindex_document to trigger actions in Ai Brain. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why reindex_document needs a policy

Reindexing queues a background operation that rebuilds the document's index entry. This is an Execute-category action because it triggers an external process whose effects depend on the document argument. It is not purely a read (it causes side effects) nor a write (it doesn't create/modify document content directly).

From the tool's definition 'Queue a rebuild of a document' — triggers an external operation (reindexing/rebuild process) rather than simply reading or writing document content

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reindex_document Rate-limited

reindex_document stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "reindex_document": {
      "limits": [
        {
          "counter": "reindex_document_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 reindex_document

What does the reindex_document tool do? +

Queue a rebuild of a document. It is categorised as a Execute tool in the Ai Brain MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on reindex_document? +

Register the Ai Brain MCP server in PolicyLayer and add a rule for reindex_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 reindex_document? +

reindex_document is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit reindex_document? +

Yes. Add a rate_limit block to the reindex_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 reindex_document completely? +

Set action: deny in the PolicyLayer policy for reindex_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 reindex_document? +

reindex_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.