gitlab_promote_milestone

THE RISK

Medium Risk

Why gitlab_promote_milestone needs a policy

The tool performs a reversible modification operation (promoting/reassigning a milestone) rather than permanent deletion or irreversible destruction. While it affects organizational structure and could impact workflows if misconfigured, the action can typically be undone by demoting the milestone back.

From the tool's definition Tool description states 'Promote a project milestone to a group milestone' — this action modifies the scope and organization of a milestone, moving it from project-level to group-level visibility and management.

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

POLICY

How to control gitlab_promote_milestone

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

policy.json

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

gitlab_promote_milestone 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 Gitlab — 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 →

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EXPLORE

Related tools and policies

More Gitlab tools

Destructive gitlab_delete_branch Delete a repository branch permanently. Requires branch. Recommended pre-check: gitlab_get Destructive gitlab_delete_draft_note Delete a merge-request draft note permanently. Irreversible. Requires merge_request_iid an Destructive gitlab_delete_group_wiki_page Delete a group wiki page permanently. Irreversible. Requires group_id and slug. Recommende Destructive gitlab_delete_issue Delete an issue permanently. Irreversible. Requires issue_iid. Recommended pre-check: gitl Destructive gitlab_delete_issue_emoji_reaction Delete an emoji reaction from an issue permanently. Irreversible for that reaction. Requir Destructive gitlab_delete_issue_link Delete an issue link permanently. Irreversible for that relation. Requires issue_iid and i Destructive gitlab_delete_issue_note_emoji_reaction Delete an emoji reaction from an issue note permanently. Irreversible for that reaction. R Destructive gitlab_delete_label Delete a label permanently. Irreversible. Requires name or label_id. Recommended pre-check

All 190 Gitlab 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 gitlab_promote_milestone

What does the gitlab_promote_milestone tool do? +

Promote a project milestone to a group milestone. It is categorised as a Write tool in the 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 gitlab_promote_milestone? +

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

What risk level is gitlab_promote_milestone? +

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

Can I rate-limit gitlab_promote_milestone? +

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

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

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

Enforce policy on every Gitlab tool call.

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

CHECK YOUR STACK →