create-collection · Mongodb3 MCP: Risk & Policy

WHAT IT DOES

What create-collection does on Mongodb3

AI agents use create-collection to create or update resources in Mongodb3 — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mongodb3 environment.

WHY IT NEEDS A POLICY

Why create-collection needs a policy

Creating a collection modifies the database structure by adding a new collection, which is a write operation. It is reversible (the collection can be deleted) and does not permanently destroy data or execute arbitrary code.

From the tool's definition The tool "create-collection" is explicitly described as creating a new collection in a database, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-collection Rate-limited

create-collection 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": {
    "create-collection": {
      "limits": [
        {
          "counter": "create-collection_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 Mongodb3, so you can run agents against it safely.

FAQ

Questions about create-collection

What does the create-collection tool do? +

Create a new collection in a database. It is categorised as a Write tool in the Mongodb3 MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create-collection? +

Register the Mongodb3 MCP server in PolicyLayer and add a rule for create-collection: 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 Mongodb3. Nothing to install.

What risk level is create-collection? +

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

Can I rate-limit create-collection? +

Yes. Add a rate_limit block to the create-collection 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 create-collection completely? +

Set action: deny in the PolicyLayer policy for create-collection. 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 create-collection? +

create-collection is provided by the Mongodb3 MCP server (mongodb3-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.