reindex · Mind Mem MCP: Risk & Policy

WHAT IT DOES

What reindex does on Mind Mem

AI agents invoke reindex to trigger actions in Mind Mem. 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 needs a policy

This tool triggers an external operation (full-text search index and vector index rebuilding) whose effects depend on system state and arguments. While not destructive (the operation is reversible and doesn't delete data), it executes a backend process that can consume significant resources, lock tables, or impact system performance.

From the tool's definition Tool name 'reindex' with description 'Trigger FTS index rebuild, optionally with vector indexing' indicates execution of a resource-intensive operation that rebuilds database indexes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reindex Rate-limited

reindex 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": {
      "limits": [
        {
          "counter": "reindex_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 Mind Mem, so you can run agents against it safely.

FAQ

Questions about reindex

What does the reindex tool do? +

Trigger FTS index rebuild, optionally with vector indexing. It is categorised as a Execute tool in the Mind Mem 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? +

Register the Mind Mem MCP server in PolicyLayer and add a rule for reindex: 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 Mind Mem. Nothing to install.

What risk level is reindex? +

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

Can I rate-limit reindex? +

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

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

reindex is provided by the Mind Mem MCP server (ovidiu-eremia/mind-mem). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.