# gitlab_get_mr_diff Show the file diff of a merge request. Agent View of the PolicyLayer registry record for `gitlab_get_mr_diff`. HTML page: https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-mr-diff ## Facts - Tool: `gitlab_get_mr_diff` - Server: Gitlab (`dkeeno/gitlab-mcp-server`) — https://policylayer.com/tools/dkeeno-gitlab-mcp-server.md - Homepage: https://github.com/dkeeno/gitlab-mcp-server - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Allowed ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "gitlab_get_mr_diff", "arguments": {} } } ``` ## Why gitlab_get_mr_diff is rated Low This tool retrieves and displays differences between files in a merge request. It performs a query/read operation without modifying, deleting, or executing any code. The blast radius if misused is minimal—an AI agent could only access existing diff information, not alter repositories or trigger operations. From the tool's own definition: "Tool name contains 'get' and description explicitly states 'Show the file diff of a merge request' — a retrieval operation with no side effects." ## Use case AI agents call gitlab_get_mr_diff to retrieve information from Gitlab without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Gitlab: ```json { "version": "1", "default": "deny", "tools": { "gitlab_get_mr_diff": {} } } ``` ## Other tools on Gitlab (55) - `gitlab_delete_branch` — Destructive — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-delete-branch.md - `gitlab_delete_ci_variable` — Destructive — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-delete-ci-variable.md - `gitlab_delete_group_variable` — Destructive — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-delete-group-variable.md - `gitlab_revoke_group_access_token` — Destructive — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-revoke-group-access-token.md - `gitlab_revoke_personal_access_token` — Destructive — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-revoke-personal-access-token.md - `gitlab_revoke_project_access_token` — Destructive — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-revoke-project-access-token.md - `gitlab_cancel_pipeline` — Execute — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-cancel-pipeline.md - `gitlab_register_local_runner` — Execute — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-register-local-runner.md - `gitlab_retry_pipeline` — Execute — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-retry-pipeline.md - `gitlab_trigger_pipeline` — Execute — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-trigger-pipeline.md - `analyze_pipeline_failure` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/analyze-pipeline-failure.md - `gitlab_clone_repo` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-clone-repo.md - `gitlab_get_file` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-file.md - `gitlab_get_job_logs` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-job-logs.md - `gitlab_get_pipeline_artifacts` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-pipeline-artifacts.md - `gitlab_get_pipeline_jobs` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-pipeline-jobs.md - `gitlab_get_pipeline_status` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-pipeline-status.md - `gitlab_get_project` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-project.md - `gitlab_get_runner_status` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-runner-status.md - `gitlab_get_security_report` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-security-report.md - `gitlab_get_security_summary` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-get-security-summary.md - `gitlab_list_branches` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-branches.md - `gitlab_list_ci_variables` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-ci-variables.md - `gitlab_list_group_access_tokens` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-group-access-tokens.md - `gitlab_list_group_variables` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-group-variables.md - `gitlab_list_groups` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-groups.md - `gitlab_list_mrs` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-mrs.md - `gitlab_list_personal_access_tokens` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-personal-access-tokens.md - `gitlab_list_pipelines` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-pipelines.md - `gitlab_list_project_access_tokens` — Read — https://policylayer.com/tools/dkeeno-gitlab-mcp-server/gitlab-list-project-access-tokens.md - …and 25 more: https://policylayer.com/tools/dkeeno-gitlab-mcp-server.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=dkeeno-gitlab-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dkeeno-gitlab-mcp-server