update_epic · Mcp Gitlab MCP: Risk & Policy

WHAT IT DOES

What update_epic does on Mcp Gitlab

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

WHY IT NEEDS A POLICY

Why update_epic needs a policy

This tool modifies existing epics in GitLab, which is a reversible write operation. While it includes a dry-run safety feature to preview changes before applying them, the actual capability is to update/modify epic data. This is categorized as Write rather than Execute because it directly modifies a specific resource (epic) rather than executing arbitrary code or commands.

From the tool's definition Tool name is 'update_epic' and description states 'Mettre a jour un epic existant' (update an existing epic).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_epic Rate-limited

update_epic 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_epic": {
      "limits": [
        {
          "counter": "update_epic_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 Mcp Gitlab, so you can run agents against it safely.

FAQ

Questions about update_epic

What does the update_epic tool do? +

Mettre a jour un epic existant. Par defaut dry_run=true : retourne un apercu sans modifier. Passer dry_run=false apres confirmation. It is categorised as a Write tool in the Mcp Gitlab 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_epic? +

Register the Mcp Gitlab MCP server in PolicyLayer and add a rule for update_epic: 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 Mcp Gitlab. Nothing to install.

What risk level is update_epic? +

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

Can I rate-limit update_epic? +

Yes. Add a rate_limit block to the update_epic 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_epic completely? +

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

update_epic is provided by the Mcp Gitlab MCP server (wanadev/gitlab-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.