gitlab_approve_merge_request
Approve merge requests after code review completion to enable merging. Use when changes are approved and ready for integration.
Instructions
Approve a merge request Returns: Approval status Use when: Code review complete, changes approved Note: Cannot approve your own MRs
Related tools:
gitlab_get_merge_request_approvals: Check status
gitlab_merge_merge_request: Merge after approval
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| project_id | No | Project identifier (auto-detected if not provided) Type: integer OR string Format: numeric ID or 'namespace/project' Optional: Yes - auto-detects from current git repository Examples: - 12345 (numeric ID) - 'gitlab-org/gitlab' (namespace/project path) - 'my-group/my-subgroup/my-project' (nested groups) Note: If in a git repo with GitLab remote, this can be omitted | |
| mr_iid | Yes | Merge request number (IID - Internal ID) Type: integer Format: Project-specific MR number (without !) Required: Yes Examples: - 456 (for MR !456) - 7890 (for MR !7890) How to find: Look at MR URL or title - URL: https://gitlab.com/group/project/-/merge_requests/456 → use 456 - Title: "Add new feature (!456)" → use 456 Note: This is NOT the global MR ID |
Implementation Reference
- src/mcp_gitlab/tool_handlers.py:348-354 (handler)The core handler function that executes the gitlab_approve_merge_request tool. It extracts or detects the project_id, requires the mr_iid argument, and delegates to GitLabClient.approve_merge_request() to perform the approval.
def handle_approve_merge_request(client: GitLabClient, arguments: Optional[Dict[str, Any]]) -> Dict[str, Any]: """Handle approving a merge request""" project_id = require_project_id(client, arguments) mr_iid = require_argument(arguments, "mr_iid") return client.approve_merge_request(project_id, mr_iid) - Pydantic/MCP schema definition for the tool, specifying input parameters: optional project_id (string) and required mr_iid (integer).
name=TOOL_APPROVE_MR, description=desc.DESC_APPROVE_MR, inputSchema={ "type": "object", "properties": { "project_id": {"type": "string", "description": desc.DESC_PROJECT_ID}, "mr_iid": {"type": "integer", "description": desc.DESC_MR_IID} }, "required": ["mr_iid"] } ), - src/mcp_gitlab/tool_handlers.py:1047-1047 (registration)Registration of the handler function in the TOOL_HANDLERS dictionary, which is used by server.py to dispatch tool calls to the appropriate handler.
TOOL_APPROVE_MR: handle_approve_merge_request, - src/mcp_gitlab/server.py:623-633 (registration)Tool schema registration in the MCP server's list_tools() method, exposing the tool to clients with name, description, and input schema.
name="gitlab_approve_merge_request", description=desc.DESC_APPROVE_MR, inputSchema={ "type": "object", "properties": { "project_id": {"type": "string", "description": desc.DESC_PROJECT_ID}, "mr_iid": {"type": "integer", "description": desc.DESC_MR_IID} }, "required": ["mr_iid"] } ), - src/mcp_gitlab/constants.py:234-234 (helper)Constant definition for the tool name string, used consistently across handler mapping, schemas, and registrations.
TOOL_APPROVE_MR = "gitlab_approve_merge_request"