index_document · OpenSearch MCP Server MCP: Risk & Policy

WHAT IT DOES

What index_document does on OpenSearch MCP Server

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

WHY IT NEEDS A POLICY

Why index_document needs a policy

This tool creates new documents or modifies existing ones in an OpenSearch index. These are reversible operations (documents can be updated again or deleted separately). It does not execute arbitrary code, delete data irreversibly, or move money.

From the tool's definition Tool name is 'index_document' with description 'Create or update a document in an index.' The verbs 'create or update' are characteristic Write operations that modify data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

index_document Rate-limited

index_document 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": {
    "index_document": {
      "limits": [
        {
          "counter": "index_document_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 OpenSearch MCP Server, so you can run agents against it safely.

FAQ

Questions about index_document

What does the index_document tool do? +

Create or update a document in an index. It is categorised as a Write tool in the OpenSearch 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 index_document? +

Register the OpenSearch MCP Server MCP server in PolicyLayer and add a rule for index_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 OpenSearch MCP Server. Nothing to install.

What risk level is index_document? +

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

Can I rate-limit index_document? +

Yes. Add a rate_limit block to the index_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 index_document completely? +

Set action: deny in the PolicyLayer policy for index_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 index_document? +

index_document is provided by the OpenSearch MCP Server MCP server (suriyakumar-hait/opensearch_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.