gitlab-api

Get commit diff

gitlab_get_commit_diff

Read-onlyIdempotent

Retrieve the diff for a specific GitLab commit to review changed files and code modifications. Use it to inspect commit contents and support code review or change audits.

Instructions

Get the diff of a commit.

Args: **kwargs: Additional parameters for the request.

Returns: Response: A wrapper containing the original response and a list of Diff models.

Raises: ParameterError: If invalid parameters are provided.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "gitlab_get_commit_diff"
  }
}

Input Schema

Name	Required	Description	Default
`all`	No
`ref`	No
`data`	No
`line`	No
`name`	No
`note`	No
`page`	No
`path`	No
`force`	No
`since`	No
`state`	No
`stats`	No
`until`	No
`branch`	No
`actions`	No
`context`	No
`dry_run`	No
`message`	No
`coverage`	No
`per_page`	No
`ref_name`	No
`user_ids`	No
`group_ids`	No
`line_type`	No
`max_pages`	No
`rule_type`	No
`start_sha`	No
`project_id`	No
`target_url`	No
`with_stats`	No
`author_name`	No
`commit_hash`	No
`description`	No
`pipeline_id`	No
`report_type`	No
`author_email`	No
`start_branch`	No
`start_project`	No
`protected_branch_ids`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed9 schema fields changedv27.3.20Nov 7, 2026

removedInput schema / properties / api_parameters

Removed value: -{
-  "anyOf": [
-    {
-      "additionalProperties": true,
-      "type": "object"
-    },
-    {
-      "type": "null"
-    }
-  ],
-  "default": null
-}

removedInput schema / properties / author_email / anyOf

Removed value: -[
-  {
-    "format": "email",
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedInput schema / properties / author_email / title
```
Added value: +"Author Email"
```
changedInput schema / properties / page / default
```
Previous value: -1New value: +null
```
changedInput schema / properties / per_page / default
```
Previous value: -100New value: +null
```
addedInput schema / properties / project_id / default
```
Added value: +null
```

removedInput schema / properties / target_url / anyOf

Removed value: -[
-  {
-    "format": "uri",
-    "maxLength": 2083,
-    "minLength": 1,
-    "type": "string"
-  },
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedInput schema / properties / target_url / title
```
Added value: +"Target Url"
```
removedInput schema / required
```
Removed value: -[
-  "project_id"
-]
```

First observedv27.3.13Oct 25, 2026

TDQS

C2.4/5.0

Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds useful behavior beyond that by disclosing the return shape (a wrapper containing the original response plus a list of Diff models) and the ParameterError failure mode, but says nothing about pagination for large diffs or the effect of flags like 'all', 'with_stats', or 'ref'.

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

Conciseness3/5

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

The text is short and front-loads the core purpose in the first sentence, which is good. However, the hand-rolled Args/Returns/Raises docstring scaffolding contributes a wasted '**kwargs' line and boilerplate that adds no navigational value.

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

Completeness2/5

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

Given 39 optional parameters, zero schema descriptions, and no output schema, the description is far too thin for the tool's complexity. The Returns section partially compensates for the missing output schema, but an agent has no way to know which of the 39 parameters to supply or which combinations are valid.

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

Parameters1/5

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

Schema description coverage is 0% across 39 parameters, so the description bears full responsibility and instead collapses everything into '**kwargs: Additional parameters for the request.' The parameters that actually matter here (project_id, commit_hash, ref, all, with_stats, page/per_page) are never explained, and the kwargs framing actively misleads about how the tool is called.

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

Purpose3/5

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

States a specific verb and resource: 'Get the diff of a commit.' An agent can tell this returns diff content, but there is no differentiation from the many adjacent siblings such as gitlab_get_commit, gitlab_get_commits, or gitlab_get_commit_comments, so it is only minimally distinguishable.

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?

There is no when-to-use guidance, no mention of when to prefer gitlab_get_commit vs this tool, and no note that project_id and commit_hash are effectively needed to target a commit. The agent is left to infer the invocation context entirely.

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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