createDealCustomField · Follow Up Boss MCP Server MCP

WHAT IT DOES

What createDealCustomField does on Follow Up Boss MCP Server

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

WHY IT NEEDS A POLICY

Why createDealCustomField needs a policy

The tool creates a new custom field in the CRM system, which modifies the schema/structure of deal data reversibly. This is a Write operation—data is created but can be removed or modified. It is not Read (no retrieval), not Destructive (reversible), not Execute (no arbitrary code), and not Financial (no monetary impact).

From the tool's definition Tool name 'createDealCustomField' and description 'Create a deal custom field' indicates data creation. The parent server description mentions 'full access...enabling CRUD operations' and the sibling tool 'createCustomField' confirms this is a creation/write…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createDealCustomField Rate-limited

createDealCustomField 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": {
    "createDealCustomField": {
      "limits": [
        {
          "counter": "createdealcustomfield_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 Follow Up Boss MCP Server, so you can run agents against it safely.

FAQ

Questions about createDealCustomField

What does the createDealCustomField tool do? +

Create a deal custom field. FUB expects. It is categorised as a Write tool in the Follow Up Boss 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 createDealCustomField? +

Register the Follow Up Boss MCP Server MCP server in PolicyLayer and add a rule for createDealCustomField: 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 Follow Up Boss MCP Server. Nothing to install.

What risk level is createDealCustomField? +

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

Can I rate-limit createDealCustomField? +

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

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

createDealCustomField is provided by the Follow Up Boss MCP Server MCP server (nerdsnipe-inc/follow-up-boss-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.