update_card · Metabase Mcp Navi MCP: Risk & Policy

WHAT IT DOES

What update_card does on Metabase Mcp Navi

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

WHY IT NEEDS A POLICY

Why update_card needs a policy

The tool updates an existing card, which is a reversible modification operation. While the description is empty, the name and server context strongly indicate this creates or modifies card metadata or query definitions in Metabase. This is Write-category (reversible change). Severity is medium because careless updates could alter dashboards or saved queries that others depend on, but the changes are undoable.

From the tool's definition Tool name 'update_card' indicates modification of a card object. Server context shows Metabase cards represent saved queries and dashboard visualizations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_card Rate-limited

update_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": {
    "update_card": {
      "limits": [
        {
          "counter": "update_card_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 Metabase Mcp Navi, so you can run agents against it safely.

FAQ

Questions about update_card

What does the update_card tool do? +

update_card. It is categorised as a Write tool in the Metabase Mcp Navi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_card? +

Register the Metabase Mcp Navi MCP server in PolicyLayer and add a rule for update_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 Mcp Navi. Nothing to install.

What risk level is update_card? +

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

Can I rate-limit update_card? +

Yes. Add a rate_limit block to the update_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 update_card completely? +

Set action: deny in the PolicyLayer policy for update_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 update_card? +

update_card is provided by the Metabase Mcp Navi MCP server (manish-coder-1007/metabase-mcp-navi). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.