# list_namespaces List all namespaces (users and groups) available to the current user. Filter by kind= Agent View of the PolicyLayer registry record for `list_namespaces`. HTML page: https://policylayer.com/tools/io-github-zereight-gitlab-mcp/list-namespaces ## Facts - Tool: `list_namespaces` - Server: Gitlab Mcp (`@zereight/mcp-gitlab`) — https://policylayer.com/tools/io-github-zereight-gitlab-mcp.md - Install: `npx -y @zereight/mcp-gitlab` - Homepage: https://github.com/zereight/gitlab-mcp - 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": "list_namespaces", "arguments": {} } } ``` ## Why list_namespaces is rated Low This tool only retrieves information about available namespaces filtered by kind. It has no side effects—it does not create, modify, delete, or execute any operations. The blast radius of misuse is minimal: an attacker gains visibility into namespace structure but cannot alter any data or trigger actions. From the tool's own definition: "Tool name 'list_namespaces' and description 'List all namespaces (users and groups) available to the current user' clearly indicates a read/query operation that retrieves and lists data without modification." ## Use case AI agents call list_namespaces to retrieve information from Gitlab Mcp 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 Mcp: ```json { "version": "1", "default": "deny", "tools": { "list_namespaces": {} } } ``` ## Other tools on Gitlab Mcp (214) - `cancel_pipeline_job` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/cancel-pipeline-job.md - `delete_branch` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-branch.md - `delete_draft_note` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-draft-note.md - `delete_group_variable` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-group-variable.md - `delete_group_wiki_page` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-group-wiki-page.md - `delete_issue` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-issue.md - `delete_issue_emoji_reaction` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-issue-emoji-reaction.md - `delete_issue_link` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-issue-link.md - `delete_issue_note_emoji_reaction` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-issue-note-emoji-reaction.md - `delete_label` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-label.md - `delete_merge_request_discussion_note` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-merge-request-discussion-note.md - `delete_merge_request_emoji_reaction` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-merge-request-emoji-reaction.md - `delete_merge_request_note` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-merge-request-note.md - `delete_merge_request_note_emoji_reaction` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-merge-request-note-emoji-reaction.md - `delete_milestone` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-milestone.md - `delete_project_variable` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-project-variable.md - `delete_release` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-release.md - `delete_tag` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-tag.md - `delete_wiki_page` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-wiki-page.md - `delete_work_item_emoji_reaction` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-work-item-emoji-reaction.md - `delete_work_item_note_emoji_reaction` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/delete-work-item-note-emoji-reaction.md - `omg_clear_state` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/omg-clear-state.md - `omg_delete_memory` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/omg-delete-memory.md - `purge_dependency_proxy_cache` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/purge-dependency-proxy-cache.md - `unprotect_branch` — Destructive — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/unprotect-branch.md - `cancel_pipeline` — Execute — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/cancel-pipeline.md - `create_pipeline` — Execute — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/create-pipeline.md - `execute_graphql` — Execute — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/execute-graphql.md - `omg_next_phase` — Execute — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/omg-next-phase.md - `play_pipeline_job` — Execute — https://policylayer.com/tools/io-github-zereight-gitlab-mcp/play-pipeline-job.md - …and 184 more: https://policylayer.com/tools/io-github-zereight-gitlab-mcp.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=io-github-zereight-gitlab-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-zereight-gitlab-mcp