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GitLab MCP Server

GitLab MCP Server

by ttpears
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

Milestones

list_milestones
Read-onlyIdempotent

Lists milestones for a GitLab project or group with issue progress statistics, so you can filter by state or search titles and review completion counts.

Instructions

List milestones for a project or group with progress statistics (total/closed issue counts)

Input Schema

NameRequiredDescriptionDefault
afterNoPagination cursor. To fetch the next page, pass the previous response pageInfo.endCursor here and repeat until pageInfo.hasNextPage is false. Paginating this way is the reliable path to complete results and accurate totals.
firstNoNumber of milestones to retrieve
stateNoFilter by state: active, closed (omit for all)
searchNoSearch milestones by title
fetchAllNoFetch multiple pages in one call, up to "first" items total (max 100) — NOT exhaustive. For complete results or accurate counts, leave this false and paginate via after (pageInfo.endCursor).
fullPathYesFull path of the project or group (e.g., "group/project-name" or "group")
isProjectYesWhether the path is a project (true) or group (false)
userCredentialsNoYour GitLab credentials (optional — falls back to the configured env token if not provided)
includeAncestorsNoInclude milestones from ancestor groups

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv4.0.0
    • removedInput schema / additionalProperties
      Removed value: -false
    • changedInput schema / properties / userCredentials / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "accessToken": {
-        "minLength": 1,
-        "type": "string"
-      },
-      "gitlabUrl": {
-        "format": "uri",
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "properties": {
+      "accessToken": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "gitlabUrl": {
+        "format": "uri",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
  2. Changed2 schema fields changedv2.2.4
    • changedInput schema / properties / after / description
      Previous value: -"Cursor for pagination"New value: +"Pagination cursor. To fetch the next page, pass the previous response pageInfo.endCursor here and repeat until pageInfo.hasNextPage is false. Paginating this way is the reliable path to complete results and accurate totals."
    • changedInput schema / properties / fetchAll / description
      Previous value: -"Fetch all pages up to 100 results"New value: +"Fetch multiple pages in one call, up to \"first\" items total (max 100) — NOT exhaustive. For complete results or accurate counts, leave this false and paginate via after (pageInfo.endCursor)."
  3. Changed2 schema fields changedv1.15.0
    • addedInput schema / properties / fetchAll
      Added value: +{
+  "default": false,
+  "description": "Fetch all pages up to 100 results",
+  "type": "boolean"
+}
    • changedInput schema / properties / userCredentials / description
      Previous value: -"Your GitLab credentials (optional - uses shared token if not provided)"New value: +"Your GitLab credentials (optional — falls back to the configured env token if not provided)"
  4. First observedv1.7.3

TDQS

A3.8/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered by structured data. The description adds one real piece of beyond-schema behavior — that results include aggregated progress statistics rather than raw milestone records — but says nothing about the pagination/accuracy caveat or whether the aggregate respects the state/search filters.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single sentence with zero filler, front-loading the verb and scope before the payload detail. Nothing repeats the name or the annotations.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With 9 parameters, two of them pagination-related and one a credential object, the schema and annotations do most of the work and the description needn't restate them. The remaining gap is small but real: it doesn't clarify whether the progress statistics are computed over the filtered result set (state/search/includeAncestors) or the full milestone set.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the parameter docs are unusually strong (pagination cursor loop, fetchAll non-exhaustiveness, state enum values, fullPath/isProject coupling). The description adds no parameter meaning of its own; baseline 3 is correct when the schema carries this much.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Specific verb ('List') plus resource ('milestones') plus the two scopes it supports (project or group), and it adds a distinct payload detail: progress statistics with total/closed issue counts. No sibling tool lists milestones, so an agent can place it unambiguously.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is implied by the resource ('for a project or group'), but the description names no alternatives and gives no when-to-use vs when-not guidance (e.g., versus get_project_statistics or get_issues for issue-level data). The agent must infer the boundary from the tool name.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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