create_milestone · Mcp Gitlab MCP: Risk & Policy

WHAT IT DOES

What create_milestone does on Mcp Gitlab

AI agents use create_milestone 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 create_milestone needs a policy

This tool creates/writes data (a milestone) but is reversible—milestones can be deleted or modified. It does not delete data (not Destructive), does not move money (not Financial), does not execute arbitrary code (not Execute), and does retrieve data (not Read). The write operation affects project planning metadata. Medium severity reflects that milestone misuse could disrupt project management but is recoverable.

From the tool's definition Tool creates a new milestone ("Creer un nouveau milestone"). The description explicitly states it defaults to dry_run=true for preview mode and requires dry_run=false to actually perform the creation, indicating reversible data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_milestone Rate-limited

create_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_milestone": {
      "limits": [
        {
          "counter": "create_milestone_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 create_milestone

What does the create_milestone tool do? +

Creer un nouveau milestone. Par defaut dry_run=true : retourne un apercu sans creer. 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 create_milestone? +

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

What risk level is create_milestone? +

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

Can I rate-limit create_milestone? +

Yes. Add a rate_limit block to the create_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 create_milestone completely? +

Set action: deny in the PolicyLayer policy for create_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 create_milestone? +

create_milestone 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.