createMangoIndex · CouchDB MCP Server MCP: Risk & Policy

WHAT IT DOES

What createMangoIndex does on CouchDB MCP Server

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

WHY IT NEEDS A POLICY

Why createMangoIndex needs a policy

This tool creates a new database index, which is a write operation that modifies database metadata and structure. It is reversible (indexes can be deleted via deleteMangoIndex as evidenced by sibling tools), so it does not qualify as Destructive. It is not Execute because it does not run arbitrary code or queries—it only creates an index definition.

From the tool's definition The tool name is 'createMangoIndex' and the description states it will 'Create a new Mango index'. Creating an index modifies the database schema and structure in a reversible manner—indexes can be deleted or recreated without losing underlying data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createMangoIndex Rate-limited

createMangoIndex 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": {
    "createMangoIndex": {
      "limits": [
        {
          "counter": "createmangoindex_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 CouchDB MCP Server, so you can run agents against it safely.

FAQ

Questions about createMangoIndex

What does the createMangoIndex tool do? +

Create a new Mango index (CouchDB 3.x+). It is categorised as a Write tool in the CouchDB 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 createMangoIndex? +

Register the CouchDB MCP Server MCP server in PolicyLayer and add a rule for createMangoIndex: 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 CouchDB MCP Server. Nothing to install.

What risk level is createMangoIndex? +

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

Can I rate-limit createMangoIndex? +

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

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

createMangoIndex is provided by the CouchDB MCP Server MCP server (robertoamoreno/couchdb-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.