customfields.createCustomField · Gojira MCP: Risk & Policy

WHAT IT DOES

What customfields.createCustomField does on Gojira

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

WHY IT NEEDS A POLICY

Why customfields.createCustomField needs a policy

This tool creates a new custom field in Jira, which modifies the system configuration. While the description explicitly notes it is revertible via deletion, the primary action is creation of data, making it a Write operation rather than Destructive.

From the tool's definition Tool description states 'Create a new custom field' and 'Revertible (the created field is deletable)'. The action creates new data (custom field definition) in an Atlassian Jira instance.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

customfields.createCustomField Rate-limited

customfields.createCustomField 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": {
    "customfields.createCustomField": {
      "limits": [
        {
          "counter": "customfields.createcustomfield_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 Gojira, so you can run agents against it safely.

FAQ

Questions about customfields.createCustomField

What does the customfields.createCustomField tool do? +

Create a new custom field. Revertible (the created field is deletable). It is categorised as a Write tool in the Gojira MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on customfields.createCustomField? +

Register the Gojira MCP server in PolicyLayer and add a rule for customfields.createCustomField: 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 Gojira. Nothing to install.

What risk level is customfields.createCustomField? +

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

Can I rate-limit customfields.createCustomField? +

Yes. Add a rate_limit block to the customfields.createCustomField 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 customfields.createCustomField completely? +

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

customfields.createCustomField is provided by the Gojira MCP server (windoze95/gojira-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

customfields.createCustomField is one line of Gojira's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →