reindex

THE RISK

High Risk

Reindexing triggers an external operation that scans and rebuilds the code index. It is not a simple read (it modifies the index state) nor purely destructive (the index can be rebuilt), but it executes a potentially expensive indexing process with side effects on the stored index. It falls under Execute as it triggers an external operation whose effects depend on the current state of the repository.

From the tool's definition Reindex files in the codebase only when repository readiness is ready

Documented attack patterns abuse exactly the kind of access reindex gives an agent:

HOW TO CONTROL REINDEX

PolicyLayer is an MCP gateway — it sits between your AI agents and Code-Index-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for reindex:

policy.json

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

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.

Create a free account and register Code-Index-MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More Code-Index-MCP tools

Execute write_summaries Run the full LLM summarization pass over all un-summarized chunks in the index. Write handshake Authenticate with the server using the configured secret. Required before other tools when Read get_status Get the status of the code index server. Shows index health, supported languages, and perf Read list_plugins List all loaded plugins and machine-readable plugin availability facts, Read search_code Search indexed code by pattern, keyword, or natural language (semantic=true) when reposito Read summarize_sample Summarize a sample of indexed files using the LLM and return results Read symbol_lookup Look up a class, function, method, or variable definition from the index when repository r

All 8 Code-Index-MCP tools →

Execute tools on other servers

Frida Game Hacking MCP remove_breakpoint Procmon request_elevation WireMCP capture_packets Pentest Ai run_probe

Go deeper

High-risk tools in Code-Index-MCP → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the reindex tool do? +

Reindex files in the codebase only when repository readiness is ready. It is categorised as a Execute tool in the Code-Index-MCP 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 Code-Index- 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 Code-Index-MCP. 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 Code-Index- MCP server (viperjuice/code-index-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Code-Index-MCP tool call.

Deterministic rules across all 8 Code-Index-MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN CODE-INDEX-MCP →

Free to start. No card required.

8 Code-Index-MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT REINDEX ON CODE-INDEX-MCP DOES

// THE RISK

// HOW TO CONTROL REINDEX

// EXPLORE