# mark_msg_as_read Mark message as read Agent View of the PolicyLayer registry record for `mark_msg_as_read`. HTML page: https://policylayer.com/tools/1021143806-napcat-mcp/mark-msg-as-read ## Facts - Tool: `mark_msg_as_read` - Server: NapCat MCP Server (`1021143806/napcat_mcp`) — https://policylayer.com/tools/1021143806-napcat-mcp.md - Homepage: https://github.com/1021143806/napcat_mcp - Risk category: Write (Medium risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Rate-limited ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "mark_msg_as_read", "arguments": {} } } ``` ## Why mark_msg_as_read is rated Medium This tool changes the read status of a message, which is a data modification but not destructive (the message itself is not deleted or overwritten). It's reversible—messages can be marked as unread again. The operation has minimal blast radius as it only affects message metadata state without affecting core data or external systems. From the tool's own definition: "Tool name 'mark_msg_as_read' and description 'Mark message as read' indicate a state change operation that modifies message read status, which is a reversible write operation." ## Use case AI agents use mark_msg_as_read to create or update resources in NapCat MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your NapCat MCP Server environment. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches NapCat MCP Server: ```json { "version": "1", "default": "deny", "tools": { "mark_msg_as_read": { "limits": [ { "counter": "mark_msg_as_read_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## 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_group_system_msg` — Read — https://policylayer.com/tools/1021143806-napcat-mcp/get-group-system-msg.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