143 tools from the Slack MCP Server, categorised by risk level.
View the Slack policy →Returns Detailed user profile information SLACK_CUSTOMIZE_URL_UNFURLING_IN_MESSAGES DEPRECATED: Customizes URL previews (unfurling) in a specific Slack message. Use `customize_url_unfurl` instead. SLACK_DELETES_A_MESSAGE_FROM_A_CHAT Deletes a message, identified by its channel ID and timestamp, from a Slack channel, private group, or direct message conversation; the authenticat... SLACK_END_SNOOZE Ends the current user's snooze mode immediately. SLACK_END_USER_DO_NOT_DISTURB_SESSION Ends the authenticated user's current Do Not Disturb (DND) session in Slack, affecting only DND status and making them available; if DND is not act... SLACK_END_USER_SNOOZE_MODE_IMMEDIATELY DEPRECATED: Ends the current user's snooze mode immediately. Use `end_snooze` instead. SLACK_FETCH_BOT_USER_INFORMATION Fetches information for a specified, existing Slack bot user; will not work for regular user accounts or other integration types. SLACK_FETCH_CONVERSATION_HISTORY Fetches a chronological list of messages and events from a specified Slack conversation, accessible by the authenticated user/bot, with options for... SLACK_FETCH_CURRENT_TEAM_INFO_WITH_OPTIONAL_TEAM_SCOPE DEPRECATED: Fetches comprehensive metadata about the current Slack team. Use `fetch_team_info` instead. SLACK_FETCH_DND_STATUS_FOR_MULTIPLE_TEAM_MEMBERS DEPRECATED: Retrieves a user's current Do Not Disturb status. Use `get_team_dnd_status` instead. SLACK_FETCH_ITEM_REACTIONS Fetches reactions for a Slack message, file, or file comment, requiring one of: channel and timestamp; file ID; or file comment ID. 2/5 SLACK_FETCH_MESSAGE_THREAD_FROM_A_CONVERSATION Retrieves replies to a specific parent message in a Slack conversation, using the channel ID and the parent message's timestamp (`ts`). SLACK_FETCH_TEAM_INFO Fetches comprehensive metadata about the current Slack team, or a specified team if the provided ID is accessible. SLACK_FETCH_WORKSPACE_SETTINGS_INFORMATION Retrieves detailed settings for a specific Slack workspace, primarily for administrators in an Enterprise Grid organization to view or audit worksp... SLACK_FIND_CHANNELS Find channels in a Slack workspace by any criteria - name, topic, purpose, or description. SLACK_FIND_USER_BY_EMAIL_ADDRESS Retrieves the Slack user object for an active user by their registered email address; fails with 'users_not_found' if the email is unregistered or ... SLACK_FIND_USERS Find users in a Slack workspace by any criteria - email, name, display name, or other text. Includes optimized email lookup for exact email matches. SLACK_GET_CANVAS Retrieves a specific Slack Canvas by its ID, including its content and metadata. SLACK_GET_CHANNEL_CONVERSATION_PREFERENCES Retrieves conversation preferences (e.g., who can post, who can thread) for a specified channel, primarily for use within Slack Enterprise Grid env... SLACK_GET_REMINDER_INFORMATION Retrieves detailed information for an existing Slack reminder specified by its ID; this is a read-only operation. SLACK_GET_REMOTE_FILE Retrieve information about a remote file added to Slack. 2/5 SLACK_GET_TEAM_DND_STATUS Retrieves a user's current Do Not Disturb status. SLACK_GET_USER_PRESENCE_INFO Retrieves a Slack user's current real-time presence (e.g., 'active', 'away') to determine their availability, noting this action does not provide h... SLACK_INITIATES_CHANNEL_BASED_CONVERSATIONS DEPRECATED: Initiates a public or private channel-based conversation. Use `create_channel` instead. SLACK_JOIN_AN_EXISTING_CONVERSATION Joins an existing Slack conversation (public channel, private channel, or multi-person direct message) by its ID, if the authenticated user has per... SLACK_LEAVE_A_CONVERSATION Leaves a Slack conversation given its channel ID; fails if leaving as the last member of a private channel or if used on a Slack Connect channel. SLACK_LIST_ACCESSIBLE_CONVERSATIONS_FOR_A_USER DEPRECATED: Retrieves conversations accessible to a specified user. Use `list_conversations` instead. SLACK_LIST_ALL_CHANNELS Lists conversations available to the user with various filters and search options. SLACK_LIST_ALL_SLACK_TEAM_CHANNELS_WITH_VARIOUS_FILTERS DEPRECATED: Lists conversations available to the user with various filters and search options. Use `list_channels` instead. SLACK_LIST_ALL_SLACK_TEAM_USERS_WITH_PAGINATION DEPRECATED: Retrieves a paginated list of all users in a Slack workspace. Use `list_all_users` instead. 2/5 SLACK_LIST_ALL_USERS Retrieves a paginated list of all users, including comprehensive details, profile information, status, and team memberships, in a Slack workspace; ... 2/5 SLACK_LIST_ALL_USERS_IN_A_USER_GROUP Retrieves a list of all user IDs within a specified Slack user group, with an option to include users from disabled groups. 2/5 SLACK_LIST_CANVASES Lists Slack Canvases with filtering by channel, user, timestamp, and page-based pagination. Uses Slack's files.list API with types=canvas filter. SLACK_LIST_CONVERSATIONS List conversations (channels/DMs) accessible to a specified user (or the authenticated user if no user ID is provided), respecting shared membershi... SLACK_LIST_FILES_WITH_FILTERS_IN_SLACK Lists files and their metadata within a Slack workspace, filterable by user, channel, timestamp, or type; this action returns metadata only, not fi... SLACK_LIST_REMINDERS Lists all reminders with their details for the authenticated Slack user; returns an empty list if no reminders exist. SLACK_LIST_REMOTE_FILES Retrieve information about a team's remote files. SLACK_LIST_SCHEDULED_MESSAGES Retrieves a list of pending (not yet delivered) messages scheduled in a specific Slack channel, or across all accessible channels if no channel ID ... SLACK_LIST_SCHEDULED_MESSAGES_IN_A_CHANNEL DEPRECATED: Retrieves a list of pending (not yet delivered) messages scheduled in a specific Slack channel. Use `list_scheduled_messages` instead. SLACK_LIST_SLACK_S_REMOTE_FILES_WITH_FILTERS DEPRECATED: Retrieve information about a team's remote files. Use `list_remote_files` instead. SLACK_LIST_STARRED_ITEMS Lists items starred by a user. SLACK_LIST_TEAM_CUSTOM_EMOJIS Retrieves all custom emojis for the Slack workspace (image URLs or aliases), not standard Unicode emojis; does not include usage statistics or crea... SLACK_LIST_USER_GROUPS_FOR_TEAM_WITH_OPTIONS Lists user groups in a Slack workspace, including user-created and default groups; results for large workspaces may be paginated. SLACK_LIST_USER_REACTIONS Lists all reactions added by a specific user to messages, files, or file comments in Slack, useful for engagement analysis when the item content it... SLACK_LIST_USER_REMINDERS_WITH_DETAILS DEPRECATED: Lists all reminders with their details for the authenticated Slack user. Use `list_reminders` instead. SLACK_LIST_WORKSPACE_USERS Retrieves a paginated list of admin users for a specified Slack workspace. 2/5 SLACK_LISTS_PINNED_ITEMS_IN_A_CHANNEL Retrieves all messages and files pinned to a specified channel; the caller must have access to this channel. 2/5 SLACK_LISTS_USER_S_STARRED_ITEMS_WITH_PAGINATION DEPRECATED: Lists items starred by a user. Use `list_starred_items` instead. SLACK_LOOKUP_CANVAS_SECTIONS Looks up section IDs in a Slack Canvas for use with targeted edit operations. Section IDs are needed for insert_after, insert_before, delete, and s... SLACK_PINS_AN_ITEM_TO_A_CHANNEL Pins a message to a specified Slack channel; the message must not already be pinned. SLACK_RETRIEVE_A_USER_S_IDENTITY_DETAILS Retrieves the authenticated user's and their team's identity, with details varying based on OAuth scopes (e.g., `identity.basic`, `identity.email`,... SLACK_RETRIEVE_CALL_INFORMATION Retrieves a point-in-time snapshot of a specific Slack call's information. SLACK_RETRIEVE_CONVERSATION_INFORMATION Retrieves metadata for a Slack conversation by ID (e.g., name, purpose, creation date, with options for member count/locale), excluding message con... SLACK_RETRIEVE_CONVERSATION_MEMBERS_LIST Retrieves a paginated list of active member IDs for a specified Slack public channel, private channel, direct message (DM), or multi-person direct ... SLACK_RETRIEVE_CURRENT_USER_DND_STATUS Retrieves a Slack user's current Do Not Disturb (DND) status to determine their availability before interaction; any specified user ID must be a va... SLACK_RETRIEVE_DETAILED_INFORMATION_ABOUT_A_FILE Retrieves detailed metadata and paginated comments for a specific Slack file ID; does not download file content. SLACK_RETRIEVE_DETAILED_USER_INFORMATION Retrieves comprehensive information for a valid Slack user ID, excluding message history and channel memberships. SLACK_RETRIEVE_MESSAGE_PERMALINK_URL Retrieves a permalink URL for a specific message in a Slack channel or conversation; the permalink respects Slack's privacy settings. SLACK_RETRIEVE_REMOTE_FILE_INFO_IN_SLACK DEPRECATED: Retrieve information about a remote file added to Slack. Use `get_remote_file` instead. 2/5 SLACK_RETRIEVE_TEAM_PROFILE_DETAILS Retrieves all profile field definitions for a Slack team, optionally filtered by visibility, to understand the team's profile structure. SLACK_RETRIEVE_USER_PROFILE_INFORMATION Retrieves profile information for a specified Slack user (defaults to the authenticated user if `user` ID is omitted); a provided `user` ID must be... SLACK_REVERSE_A_CONVERSATION_S_ARCHIVAL_STATUS DEPRECATED: Reverses conversation archival. Use `unarchive_channel` instead. SLACK_SCHEDULES_A_MESSAGE_TO_A_CHANNEL_AT_A_SPECIFIED_TIME DEPRECATED: Schedules a message to a Slack channel, DM, or private group for a future time. Use `schedule_message` instead. SLACK_SEARCH_ALL Tool to search all messages and files. Use when you need unified content search across channels and files in one call. 3/5 SLACK_SEARCH_FOR_MESSAGES_WITH_QUERY DEPRECATED: Searches messages in a Slack workspace using a query with optional modifiers. Use `search_messages` instead. 2/5 SLACK_SEARCH_MESSAGES Workspace‑wide Slack message search with date ranges and filters. Use `query` modifiers (e.g., in:#channel, from:@user, before/after:YYYY-MM-DD), s... 2/5 SLACK_SENDS_A_MESSAGE_TO_A_SLACK_CHANNEL DEPRECATED: Posts a message to a Slack channel, direct message, or private group. Use `send_message` instead. SLACK_SENDS_EPHEMERAL_MESSAGES_TO_CHANNEL_USERS DEPRECATED: Sends an ephemeral message to a user in a channel. Use `send_ephemeral_message` instead. SLACK_SHARE_A_ME_MESSAGE_IN_A_CHANNEL Sends a 'me message' (e.g., '/me is typing') to a Slack channel, where it's displayed as a third-person user action; messages are plain text and th... SLACK_SHARE_REMOTE_FILE_IN_CHANNELS Shares a remote file, which must already be registered with Slack, into specified Slack channels or direct message conversations. SLACK_UNPIN_ITEM_FROM_CHANNEL Unpins a message, identified by its timestamp, from a specified channel if the message is currently pinned there; this operation is destructive. SLACK_UPDATES_A_SLACK_MESSAGE Updates a Slack message, identified by `channel` ID and `ts` timestamp, by modifying its `text`, `attachments`, or `blocks`; provide at least one c... SLACK_ACTIVATE_OR_MODIFY_DO_NOT_DISTURB_DURATION DEPRECATED: Turns on Do Not Disturb mode for the current user, or changes its duration. Use `set_dnd_duration` instead. 2/5 SLACK_ADD_A_CUSTOM_EMOJI_TO_A_SLACK_TEAM DEPRECATED: Adds a custom emoji to a Slack workspace given a unique name and an image URL. Use `add_emoji` instead. 3/5 SLACK_ADD_A_REMOTE_FILE_FROM_A_SERVICE Adds a reference to an external file (e.g., Google Drive, Dropbox) to Slack for discovery and sharing, requiring a unique `external_id` and an `ext... 3/5 SLACK_ADD_A_STAR_TO_AN_ITEM Stars a channel, file, file comment, or a specific message in Slack. 2/5 SLACK_ADD_AN_EMOJI_ALIAS_IN_SLACK Adds an alias for an existing custom emoji in a Slack Enterprise Grid organization. 3/5 SLACK_ADD_CALL_PARTICIPANTS Registers new participants added to a Slack call. 2/5 SLACK_ADD_EMOJI Adds a custom emoji to a Slack workspace given a unique name and an image URL; subject to workspace emoji limits. 3/5 SLACK_ADD_REACTION_TO_AN_ITEM Adds a specified emoji reaction to an existing message in a Slack channel, identified by its timestamp; does not remove or retrieve reactions. 2/5 SLACK_ARCHIVE_A_PUBLIC_OR_PRIVATE_CHANNEL Archives a Slack public or private channel, making it read-only; the primary 'general' channel cannot be archived. 2/5 SLACK_ARCHIVE_A_SLACK_CONVERSATION Archives a Slack conversation by its ID, rendering it read-only and hidden while retaining history, ideal for cleaning up inactive channels; be awa... 2/5 SLACK_CHAT_POST_MESSAGE DEPRECATED: Posts a message to a Slack channel, direct message, or private channel. Use `send_message` instead. 2/5 SLACK_CLOSE_DM_OR_MULTI_PERSON_DM Closes a Slack direct message (DM) or multi-person direct message (MPDM) channel, removing it from the user's sidebar without deleting history; thi... 2/5 SLACK_CREATE_A_REMINDER Creates a Slack reminder with specified text and time; time accepts Unix timestamps, seconds from now, or natural language (e.g., 'in 15 minutes', ... 3/5 SLACK_CREATE_A_SLACK_USER_GROUP Creates a new User Group (often referred to as a subteam) in a Slack workspace. 2/5 SLACK_CREATE_CANVAS Creates a new Slack Canvas with the specified title and optional content. 2/5 SLACK_CREATE_CHANNEL Initiates a public or private channel-based conversation 2/5 SLACK_CREATE_CHANNEL_BASED_CONVERSATION Creates a new public or private Slack channel with a unique name; the channel can be org-wide, or team-specific if `team_id` is given (required if ... 2/5 SLACK_EDIT_CANVAS Edits a Slack Canvas with granular control over content placement. Supports replace, insert (before/after/start/end) operations for flexible conten... 2/5 SLACK_ENABLE_A_SPECIFIED_USER_GROUP Enables a disabled User Group in Slack using its ID, reactivating it for mentions and permissions; this action only changes the enabled status and ... 2/5 SLACK_ENABLE_PUBLIC_SHARING_OF_A_FILE Enables public sharing for an existing Slack file by generating a publicly accessible URL; this action does not create new files. 3/5 SLACK_END_A_CALL_WITH_DURATION_AND_ID Ends an ongoing Slack call, identified by its ID (obtained from `calls.add`), optionally specifying the call's duration. 2/5 SLACK_INVITE_USER_TO_CHANNEL Invites users to a specified Slack channel; this action is restricted to Enterprise Grid workspaces and requires the authenticated user to be a mem... 2/5 SLACK_INVITE_USER_TO_WORKSPACE Invites a user to a Slack workspace and specified channels by email; use `resend=True` to re-process an existing invitation for a user not yet sign... 2/5 SLACK_INVITE_USER_TO_WORKSPACE_WITH_OPTIONAL_CHANNEL_INVITES DEPRECATED: Invites a user to a Slack workspace and specified channels by email. Use `invite_user_to_workspace` instead. 2/5 SLACK_INVITE_USERS_TO_A_SLACK_CHANNEL Invites users to an existing Slack channel using their valid Slack User IDs. 2/5 SLACK_MANUALLY_SET_USER_PRESENCE Manually sets a user's Slack presence, overriding automatic detection; this setting persists across connections but can be overridden by user actio... 2/5 SLACK_MARK_REMINDER_AS_COMPLETE Marks a specific Slack reminder as complete using its `reminder` ID; **DEPRECATED**: This Slack API endpoint ('reminders.complete') was deprecated ... 2/5 SLACK_OPEN_DM Opens or resumes a Slack direct message (DM) or multi-person direct message (MPIM) by providing either user IDs or an existing channel ID. 2/5 SLACK_OPEN_OR_RESUME_DIRECT_OR_MULTI_PERSON_MESSAGES DEPRECATED: Opens or resumes a Slack direct message (DM) or multi-person direct message (MPIM). Use `open_dm` instead. 2/5 SLACK_REGISTER_CALL_PARTICIPANTS_REMOVAL DEPRECATED: Registers participants removed from a Slack call. Use `remove_call_participants` instead. 2/5 SLACK_RENAME_A_CONVERSATION Renames a Slack channel, automatically adjusting the new name to meet naming conventions (e.g., converting to lowercase), which may affect integrat... 2/5 SLACK_RENAME_A_SLACK_CHANNEL Renames a public or private Slack channel; for Enterprise Grid workspaces, the user must be a Workspace Admin or Channel Manager. 3/5 SLACK_RENAME_AN_EMOJI Renames an existing custom emoji in a Slack workspace, updating all its instances. 3/5 SLACK_SCHEDULE_MESSAGE Schedules a message to a Slack channel, DM, or private group for a future time (`post_at`), requiring `text`, `blocks`, or `attachments` for conten... 2/5 SLACK_SEND_EPHEMERAL_MESSAGE Sends an ephemeral message to a user in a channel. 2/5 SLACK_SEND_MESSAGE Posts a message to a Slack channel, direct message, or private group; requires content via `text`, `blocks`, or `attachments`. 2/5 SLACK_SET_A_CONVERSATION_S_PURPOSE Sets the purpose (a short description of its topic/goal, displayed in the header) for a Slack conversation; the calling user must be a member. 2/5 SLACK_SET_DND_DURATION Turns on Do Not Disturb mode for the current user, or changes its duration. 2/5 SLACK_SET_PROFILE_PHOTO This method allows the user to set their profile image. 2/5 SLACK_SET_READ_CURSOR_IN_A_CONVERSATION Marks a message, specified by its timestamp (`ts`), as the most recently read for the authenticated user in the given `channel`, provided the user ... 2/5 SLACK_SET_SLACK_USER_PROFILE_INFORMATION Updates a Slack user's profile, setting either individual fields or multiple fields via a JSON object. 2/5 SLACK_SET_STATUS Sets the Slack status for the authenticated user with a custom text and optional emoji. The status appears next to the user's name in Slack. 2/5 SLACK_SET_THE_TOPIC_OF_A_CONVERSATION Sets or updates the topic for a specified Slack conversation. 2/5 SLACK_SET_USER_PROFILE_PHOTO_WITH_CROPPING_OPTIONS DEPRECATED: This method allows the user to set their profile image. Use `set_profile_photo` instead. 2/5 SLACK_UNARCHIVE_A_PUBLIC_OR_PRIVATE_CHANNEL Unarchives a specified public or private Slack channel that is currently archived, using its channel ID. 2/5 SLACK_UNARCHIVE_CHANNEL Reverses conversation archival. 2/5 SLACK_UPDATE_AN_EXISTING_SLACK_USER_GROUP Updates an existing Slack User Group, which must be specified by an existing `usergroup` ID, with new optional details such as its name, descriptio... 2/5 SLACK_UPDATE_SLACK_CALL_INFORMATION Updates the title, join URL, or desktop app join URL for an existing Slack call identified by its ID. 2/5 SLACK_UPDATE_USER_GROUP_MEMBERS Replaces all members of an existing Slack User Group with a new list of valid user IDs. 2/5 SLACK_UPDATES_AN_EXISTING_REMOTE_FILE Updates metadata or content details for an existing remote file in Slack; this action cannot upload new files or change the fundamental file type. 3/5 SLACK_UPLOAD_OR_CREATE_A_FILE_IN_SLACK Uploads a file to Slack, requiring either `content` (for text) or `file` (for binary data), optionally sharing it in specified `channels` or as a r... 3/5 SLACK_CLEAR_STATUS Clears the Slack status for the authenticated user, removing any custom text and emoji. 4/5 SLACK_CUSTOMIZE_URL_UNFURL Customizes URL previews (unfurling) in a specific Slack message using a URL-encoded JSON in `unfurls` to define custom content or remove existing p... 4/5 SLACK_DELETE_A_COMMENT_ON_A_FILE Deletes a specific comment from a file in Slack; this action is irreversible. 4/5 SLACK_DELETE_A_FILE_BY_ID Permanently deletes an existing file from a Slack workspace using its unique file ID; this action is irreversible and also removes any associated c... 4/5 SLACK_DELETE_A_PUBLIC_OR_PRIVATE_CHANNEL Permanently and irreversibly deletes a specified public or private channel, including all its messages and files, within a Slack Enterprise Grid or... 4/5 SLACK_DELETE_A_SCHEDULED_MESSAGE_IN_A_CHAT Deletes a pending, unsent scheduled message from the specified Slack channel, identified by its `scheduled_message_id`. 4/5 SLACK_DELETE_A_SLACK_REMINDER Deletes an existing Slack reminder, typically when it is no longer relevant or a task is completed; this operation is irreversible. 4/5 SLACK_DELETE_CANVAS Deletes a Slack Canvas permanently. 4/5 SLACK_DELETE_USER_PROFILE_PHOTO Deletes the Slack profile photo for the user identified by the token, reverting them to the default avatar; this action is irreversible and succeed... 5/5 SLACK_DISABLE_AN_EXISTING_SLACK_USER_GROUP Disables a specified, currently enabled Slack User Group by its unique ID, effectively archiving it by setting its 'date_delete' timestamp; the gro... 4/5 SLACK_REMOVE_A_REMOTE_FILE Removes the Slack reference to an external file (which must have been previously added via the remote files API), specified by either its `external... 5/5 SLACK_REMOVE_A_STAR_FROM_AN_ITEM Removes a star from a previously starred Slack item (message, file, file comment, channel, group, or DM), requiring identification via `file`, `fil... 5/5 SLACK_REMOVE_A_USER_FROM_A_CONVERSATION Removes a specified user from a Slack conversation (channel); the caller must have permissions to remove users and cannot remove themselves using t... 4/5 SLACK_REMOVE_CALL_PARTICIPANTS Registers participants removed from a Slack call. 4/5 SLACK_REMOVE_REACTION_FROM_ITEM Removes an emoji reaction from a message, file, or file comment in Slack. 5/5 SLACK_REVOKE_PUBLIC_SHARING_ACCESS_FOR_A_FILE Revokes a Slack file's public URL, making it private; this is a no-op if not already public and is irreversible. 5/5 SLACK_REGISTERS_A_NEW_CALL_WITH_PARTICIPANTS DEPRECATED: Registers a new call in Slack using `calls.add` for third-party call integration. Use `start_call` instead. 3/5 SLACK_REGISTERS_NEW_CALL_PARTICIPANTS DEPRECATED: Registers new participants added to a Slack call. Use `add_call_participants` instead. 3/5 SLACK_START_CALL Registers a new call in Slack using `calls.add` for third-party call integration; `created_by` is required if not using a user-specific token. 3/5 SLACK_START_REAL_TIME_MESSAGING_SESSION Initiates a Slack RTM session providing a single-use WebSocket URL (valid 30s) for event streaming; does not set initial presence status. 3/5 The Slack MCP server exposes 143 tools across 4 categories: Read, Write, Destructive, Execute.
Use Intercept, the open-source MCP proxy. Write YAML rules for each tool — rate limits, argument validation, or deny rules — then run Intercept in front of the Slack server.
Slack tools are categorised as Read (72), Write (51), Destructive (16), Execute (4). Each category has a recommended default policy.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept