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GitLab MCP Server

GitLab MCP Server

by ttpears

Search Labels

search_labels
Read-onlyIdempotent

Find labels in a GitLab project or group, optionally filtering by a search term to locate relevant labels.

Instructions

Search for labels in a project or group, with optional text filtering

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 labels to retrieve
searchNoOptional search term to filter labels
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)

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. Changed3 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 / first / default
      Previous value: -50New value: +20
    • 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

B3.4/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds scope and filtering context, but does not explain pagination behavior, return format, or rate limits. This is adequate but not rich beyond annotations.

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?

The description is a single efficient sentence with the core purpose front-loaded. There is no wasted text.

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?

Given the fully documented schema and read-only annotations, the description is mostly complete for correct invocation. It omits explicit routing guidance versus sibling search tools, but the essential scope and filtering behavior are present.

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%, so all seven parameters are already documented in the schema. The description only reiterates project/group scope and optional text filtering, adding little beyond what the schema provides. Baseline 3 is appropriate.

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

Purpose4/5

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

The description states a specific verb and resource: search labels. It also names the scope (project or group) and optional text filtering. It does not explicitly differentiate this tool from sibling search tools, which keeps it below a 5.

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

Usage Guidelines2/5

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

The description explains what the tool does but gives no explicit when-to-use guidance, prerequisites, or alternatives. An agent must infer that this is the label-specific search tool from the name and purpose alone.

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