# get_group_system_msg Get group system messages Agent View of the PolicyLayer registry record for `get_group_system_msg`. HTML page: https://policylayer.com/tools/1021143806-napcat-mcp/get-group-system-msg ## Facts - Tool: `get_group_system_msg` - Server: NapCat MCP Server (`1021143806/napcat_mcp`) — https://policylayer.com/tools/1021143806-napcat-mcp.md - Homepage: https://github.com/1021143806/napcat_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": "get_group_system_msg", "arguments": {} } } ``` ## Why get_group_system_msg is rated Low This tool retrieves system messages from a group, which is a read-only operation. It queries existing data without creating, modifying, deleting, or executing operations. The blast radius is minimal since it only exposes existing system messages that are typically visible to group members. Low severity is appropriate for informational retrieval. From the tool's own definition: "Tool name 'get_group_system_msg' and description 'Get group system messages' indicate data retrieval with no modification or side effects." ## Use case AI agents call get_group_system_msg to retrieve information from NapCat MCP Server 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 NapCat MCP Server: ```json { "version": "1", "default": "deny", "tools": { "get_group_system_msg": {} } } ``` ## Other tools on NapCat MCP Server (56) - `delete_essence_msg` — Destructive — https://policylayer.com/tools/1021143806-napcat-mcp/delete-essence-msg.md - `delete_group_file` — Destructive — https://policylayer.com/tools/1021143806-napcat-mcp/delete-group-file.md - `delete_msg` — Destructive — https://policylayer.com/tools/1021143806-napcat-mcp/delete-msg.md - `set_group_kick` — Destructive — https://policylayer.com/tools/1021143806-napcat-mcp/set-group-kick.md - `set_group_ban` — Execute — https://policylayer.com/tools/1021143806-napcat-mcp/set-group-ban.md - `set_group_whole_ban` — Execute — https://policylayer.com/tools/1021143806-napcat-mcp/set-group-whole-ban.md - `can_send_image` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/can-send-image.md - `can_send_record` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/can-send-record.md - `get_cookies` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-cookies.md - `get_credentials` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-credentials.md - `get_csrf_token` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-csrf-token.md - `get_essence_msg_list` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-essence-msg-list.md - `get_forward_msg` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-forward-msg.md - `get_friend_list` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-friend-list.md - `get_friend_msg_history` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-friend-msg-history.md - `get_group_announcement_list` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-announcement-list.md - `get_group_at_all_remain` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-at-all-remain.md - `get_group_file_system_info` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-file-system-info.md - `get_group_file_url` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-file-url.md - `get_group_files_by_folder` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-files-by-folder.md - `get_group_honor_info` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-honor-info.md - `get_group_ignore_add_request` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-ignore-add-request.md - `get_group_info` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-info.md - `get_group_info_ex` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-info-ex.md - `get_group_list` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-list.md - `get_group_member_info` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-member-info.md - `get_group_member_list` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-member-list.md - `get_group_msg_history` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-msg-history.md - `get_group_root_files` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-root-files.md - `get_image` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-image.md - …and 26 more: https://policylayer.com/tools/1021143806-napcat-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=1021143806-napcat-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/1021143806-napcat-mcp