quickbase_create_lookup_field · QuickBase MCP Server MCP

WHAT IT DOES

What quickbase_create_lookup_field does on QuickBase MCP Server

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

WHY IT NEEDS A POLICY

Why quickbase_create_lookup_field needs a policy

The tool creates a new lookup field in a QuickBase table, which is a reversible write operation that modifies database schema. While it doesn't directly modify existing data, creating a field is a structural change that can be undone by deleting the field.

From the tool's definition Tool description states 'Create a lookup field' which is a data creation operation. The sibling tools include destructive operations (quickbase_delete_field, quickbase_delete_record, quickbase_delete_table) and write operations (quickbase_create_field,…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

quickbase_create_lookup_field Rate-limited

quickbase_create_lookup_field 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": {
    "quickbase_create_lookup_field": {
      "limits": [
        {
          "counter": "quickbase_create_lookup_field_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 QuickBase MCP Server, so you can run agents against it safely.

FAQ

Questions about quickbase_create_lookup_field

What does the quickbase_create_lookup_field tool do? +

Create a lookup field to pull data from a related table. It is categorised as a Write tool in the QuickBase 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 quickbase_create_lookup_field? +

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

What risk level is quickbase_create_lookup_field? +

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

Can I rate-limit quickbase_create_lookup_field? +

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

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

quickbase_create_lookup_field is provided by the QuickBase MCP Server MCP server (lawrencecirillo/quickbase-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.