update_look · Looker MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_look does on Looker MCP Server

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

WHY IT NEEDS A POLICY

Why update_look needs a policy

This tool modifies existing data/content (a Look) reversibly. It is not destructive (the Look is not deleted), not financial, and not code execution. The medium severity reflects that updating a Look could affect downstream dashboards, reports, or analyses that depend on it, potentially misleading users if the modification changes query logic or display without proper version control or change tracking.

From the tool's definition Tool name 'update_look' and description 'Update a Look' indicate modification of existing content. Looker Looks are saved queries/visualizations that can be shared and depended upon by users.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_look Rate-limited

update_look 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_look": {
      "limits": [
        {
          "counter": "update_look_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 Looker MCP Server, so you can run agents against it safely.

FAQ

Questions about update_look

What does the update_look tool do? +

Update a Look. It is categorised as a Write tool in the Looker 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 update_look? +

Register the Looker MCP Server MCP server in PolicyLayer and add a rule for update_look: 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 Looker MCP Server. Nothing to install.

What risk level is update_look? +

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

Can I rate-limit update_look? +

Yes. Add a rate_limit block to the update_look 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_look completely? +

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

update_look is provided by the Looker MCP Server MCP server (ultrathink-solutions/looker-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.