create_mongodb_card · Metabase MCP: Risk & Policy

WHAT IT DOES

What create_mongodb_card does on Metabase

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

WHY IT NEEDS A POLICY

Why create_mongodb_card needs a policy

Creating a MongoDB card (a saved query or visualization in Metabase) is a Write operation—it creates new data structures that can be modified or deleted later. While not inherently destructive, it modifies the state of the analytics system.

From the tool's definition Tool name 'create_mongodb_card' indicates creation of a new card object (similar to 'create_card' which creates queries/visualizations in Metabase).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_mongodb_card Rate-limited

create_mongodb_card 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_mongodb_card": {
      "limits": [
        {
          "counter": "create_mongodb_card_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Metabase, so you can run agents against it safely.

FAQ

Questions about create_mongodb_card

What does the create_mongodb_card tool do? +

create_mongodb_card. It is categorised as a Write tool in the Metabase 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_mongodb_card? +

Register the Metabase MCP server in PolicyLayer and add a rule for create_mongodb_card: 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 Metabase. Nothing to install.

What risk level is create_mongodb_card? +

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

Can I rate-limit create_mongodb_card? +

Yes. Add a rate_limit block to the create_mongodb_card 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_mongodb_card completely? +

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

create_mongodb_card is provided by the Metabase MCP server (voducdan/matebase-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.