mongodb_update_one · Multi-Database MCP Server MCP

WHAT IT DOES

What mongodb_update_one does on Multi-Database MCP Server

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

WHY IT NEEDS A POLICY

Why mongodb_update_one needs a policy

This tool modifies data reversibly by updating a single MongoDB document. It is categorized as Write rather than Execute because the operation is a standard database mutation with predictable, bounded effects on a specific document.

From the tool's definition Tool name 'mongodb_update_one' and description 'Update a single document in a MongoDB collection' indicate modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mongodb_update_one Rate-limited

mongodb_update_one 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": {
    "mongodb_update_one": {
      "limits": [
        {
          "counter": "mongodb_update_one_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 Multi-Database MCP Server, so you can run agents against it safely.

FAQ

Questions about mongodb_update_one

What does the mongodb_update_one tool do? +

Update a single document in a MongoDB collection (requires FULL mode). It is categorised as a Write tool in the Multi-Database 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 mongodb_update_one? +

Register the Multi-Database MCP Server MCP server in PolicyLayer and add a rule for mongodb_update_one: 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 Multi-Database MCP Server. Nothing to install.

What risk level is mongodb_update_one? +

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

Can I rate-limit mongodb_update_one? +

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

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

mongodb_update_one is provided by the Multi-Database MCP Server MCP server (nam088/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

mongodb_update_one is one line of Multi-Database MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

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