sync_index · Code Intelligence MCP Server MCP: Risk & Policy

WHAT IT DOES

What sync_index does on Code Intelligence MCP Server

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

WHY IT NEEDS A POLICY

Why sync_index needs a policy

This tool writes/updates data in a ChromaDB vector index by syncing source code into it. It creates or modifies index entries (a reversible write operation), but does not delete data or execute arbitrary code. Misuse could cause the index to reflect incorrect or stale code, misleading subsequent analysis tools.

From the tool's definition Sync source code to ChromaDB index

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sync_index Rate-limited

sync_index 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": {
    "sync_index": {
      "limits": [
        {
          "counter": "sync_index_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 Code Intelligence MCP Server, so you can run agents against it safely.

FAQ

Questions about sync_index

What does the sync_index tool do? +

Sync source code to ChromaDB index. It is categorised as a Write tool in the Code Intelligence MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sync_index? +

Register the Code Intelligence MCP Server MCP server in PolicyLayer and add a rule for sync_index: 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 Intelligence MCP Server. Nothing to install.

What risk level is sync_index? +

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

Can I rate-limit sync_index? +

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

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

sync_index is provided by the Code Intelligence MCP Server MCP server (tech-spoke/llm-helper). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.