issueCreation_updateFields

THE RISK

Medium Risk

Why issueCreation_updateFields needs a policy

The tool explicitly updates field values in wizard state, which is a reversible modification of data. While part of an issue creation flow, the update operation itself does not irreversibly delete data (not Destructive), execute arbitrary code (not Execute), or move money (not Financial). It is a Write operation.

From the tool's definition Tool name 'issueCreation_updateFields' and description indicates it 'Update[s] and validate[s] specific field values in the wizard state' — this modifies stored data within the Jira issue creation workflow.

Documented attack patterns abuse exactly the kind of access issueCreation_updateFields gives an agent:

POLICY

How to control issueCreation_updateFields

PolicyLayer is an MCP gateway — it sits between your AI agents and Jira MCP Toolset, and nothing reaches the server without passing your rules. This is the rule we recommend for issueCreation_updateFields:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "issueCreation_updateFields": {
      "limits": [
        {
          "counter": "issuecreation_updatefields_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

issueCreation_updateFields 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.

Create a free account and register Jira MCP Toolset — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Jira MCP Toolset tools

Write issueCreation_createIssue Finalizes the wizard process by creating a Jira issue using the currently configured state Write issueCreation_initiateState Initialize a new, empty state for the issue creation wizard. Useful for testing state pers Write issueCreation_resetState Resets the issue creation wizard state completely, clearing any selected project, issue ty Write issueCreation_setAnalysisComplete Sets the analysis complete flag for the current issue creation session Write issueCreation_setUserConfirmation Sets the user confirmation flag for the current issue creation session. CRITICAL: Wait for Write issueCreation_updateState Update the core state of the issue creation wizard. Use this to set the Write issueUpdateWizard_updateIssueFromState Update a Jira issue using the current state. This tool works in two modes: 1) Immediately Read analyzeJiraIssue Performs comprehensive analysis of a Jira issue

All 19 Jira MCP Toolset tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about issueCreation_updateFields

What does the issueCreation_updateFields tool do? +

Update and validate specific field values in the wizard state after retrieving the necessary fields with. It is categorised as a Write tool in the Jira MCP Toolset MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on issueCreation_updateFields? +

Register the Jira MCP Toolset MCP server in PolicyLayer and add a rule for issueCreation_updateFields: 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 Jira MCP Toolset. Nothing to install.

What risk level is issueCreation_updateFields? +

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

Can I rate-limit issueCreation_updateFields? +

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

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

issueCreation_updateFields is provided by the Jira MCP Toolset MCP server (tbreeding/jira-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Jira MCP Toolset tool call.

Start from Jira MCP Toolset, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →