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gitlab_add_comment_to_issue

Add comments to GitLab issues to provide updates, ask questions, or share information directly through the MCP server for GitLab and Jira integration.

Instructions

Adds a comment to a GitLab issue.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
projectPathYesThe path of the GitLab project.
issueIidYesThe internal ID of the issue.
bodyYesThe comment text.

Implementation Reference

  • MCP tool handler for gitlab_add_comment_to_issue: extracts arguments, calls GitLabService.addCommentToIssue, and returns success response.
    case 'gitlab_add_comment_to_issue': {
      if (!gitlabService) {
        throw new Error('GitLab service is not initialized.');
      }
      const { projectPath, issueIid, body } = args as { projectPath: string; issueIid: number; body: string };
      const result = await gitlabService.addCommentToIssue(projectPath, issueIid, body);
      return {
        content: [
          {
            type: 'text',
            text: `Comment added successfully: ${JSON.stringify(result, null, 2)}`,
          },
        ],
      };
    }
  • Tool schema definition and registration in allTools array, including input schema for projectPath, issueIid, and body.
    {
      name: 'gitlab_add_comment_to_issue',
      description: 'Adds a comment to a GitLab issue.',
      inputSchema: {
        type: 'object',
        properties: {
          projectPath: {
            type: 'string',
            description: 'The path of the GitLab project.',
          },
          issueIid: {
            type: 'number',
            description: 'The internal ID of the issue.',
          },
          body: {
            type: 'string',
            description: 'The comment text.',
          },
        },
        required: ['projectPath', 'issueIid', 'body'],
      },
  • Core implementation in GitLabService: calls GitLab API to POST a note (comment) to the specified issue.
    async addCommentToIssue(projectPath: string, issueIid: number, body: string): Promise<any> {
      const encodedProjectPath = encodeURIComponent(projectPath);
      return this.callGitLabApi<any>(
        `projects/${encodedProjectPath}/issues/${issueIid}/notes`,
        'POST',
        { body },
      );
    }
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. While 'Adds a comment' implies a write/mutation operation, it doesn't disclose important behavioral traits like required permissions, whether comments are editable/deletable, rate limits, or what happens on success/failure. This is inadequate for a mutation tool with zero annotation coverage.

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 zero wasted words. It's appropriately sized for a straightforward tool and front-loads the essential information.

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?

For a mutation tool with no annotations and no output schema, the description is insufficient. It doesn't explain what happens after the comment is added (success response, error conditions), nor does it provide context about permissions, limitations, or how this tool fits within the broader GitLab workflow.

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 the schema already fully documents all three parameters. The description adds no additional meaning about parameters beyond what's in the schema. This meets the baseline expectation when schema coverage is complete.

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 clearly states the action ('Adds a comment') and target resource ('to a GitLab issue'), providing a specific verb+resource combination. However, it doesn't differentiate from its sibling 'gitlab_add_comment_to_merge_request', which performs a similar action on a different resource type.

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 provides no guidance on when to use this tool versus alternatives. There's no mention of prerequisites (like authentication), when not to use it, or how it differs from similar tools like 'gitlab_update_issue' which might also allow commenting.

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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