Slack

Registers new participants added to a Slack call.

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Adds a custom emoji to a Slack workspace given a unique name and an image URL; subject to workspace emoji limits.

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Adds an alias for an existing custom emoji in a Slack Enterprise Grid organization.

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Adds an Enterprise user to a workspace. Use when you need to assign an existing Enterprise Grid user to a specific workspace with optional guest restrictions.

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Adds a specified emoji reaction to an existing message in a Slack channel, identified by its timestamp; does not remove or retrieve reactions.

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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 `external_url` accessible by Slack.

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Stars a channel, file, file comment, or a specific message in Slack.

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Tool to search for public or private channels in an Enterprise organization. Use when you need to find channels by name, type, or other criteria within an Enterprise Grid workspace.

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Tool to check API calling code by testing connectivity and authentication to the Slack API. Use when you need to verify that API credentials are valid and the connection is working properly.

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Archives a Slack conversation by its ID, rendering it read-only and hidden while retaining history, ideal for cleaning up inactive channels; be aware that some channels (like #general or certain DMs) cannot be archived and this may impact connected integrations.

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Search Slack messages, files, channels, and users via Real-time Search API. For queries referencing entities by name (users/channels/files), first resolve with content_types (users/channels/files) to get exact ID. If multiple matches, ask user to clarify before proceeding (e.g. ask for user email).

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Check if semantic (AI-powered) search is available on the Slack workspace. Returns whether natural language queries will trigger semantic search in assistant.search.context calls.

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(DEPRECATED: use `SLACK_SEND_MESSAGE`) Posts a message to a Slack channel, DM, or private group; requires at least one content field (`markdown_text`, `text`, `blocks`, or `attachments`) — omitting all causes a `no_text` error. Fails with `not_in_channel`, `channel_not_found`, or `channel_is_archived` if the bot lacks…

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Closes a Slack direct message (DM) or multi-person direct message (MPDM) channel, removing it from the user's sidebar without deleting history; this action affects only the calling user's view.

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Convert a public Slack channel to private using the Admin API. This is an Enterprise Grid only feature and requires an org-installed user token with admin.conversations:write scope.

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Creates a Slack reminder with specified text and time; time accepts Unix timestamps, seconds from now, or natural language (e.g., 'in 15 minutes', 'every Thursday at 2pm').

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Creates a new Slack Canvas with the specified title and optional content.

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Initiates a public or private channel-based conversation in a Slack workspace. Immediately creates the channel; invoke only after explicit user confirmation.

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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 `org_wide` is false or not provided).

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Tool to create an Enterprise team in Slack. Use when you need to create a new team (workspace) within an Enterprise Grid organization. Requires admin.teams:write scope.

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Creates a new Slack List via `slackLists.create`. Provide a `name` and, optionally, a `description_blocks` description and a `schema` of typed columns. You can instead copy an existing List's structure with `copy_from_list_id` (and its rows via `include_copied_list_records`), or enable task-tracking columns with `todo…

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Creates a new item (row) in a Slack List via `slackLists.items.create`. Set initial cell values with `initial_fields`; text columns require Block Kit `rich_text` (a plain string is wrapped automatically). Optionally duplicate an existing row with `duplicated_item_id` or create a subtask with `parent_item_id`. Requires…

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Creates a new User Group (often referred to as a subteam) in a Slack workspace.

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Customizes URL previews (unfurling) in a specific Slack message using a URL-encoded JSON in `unfurls` to define custom content or remove existing previews.

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Deletes a Slack Canvas permanently and irreversibly. Always confirm with the user before calling this tool.

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Permanently and irreversibly deletes a specified public or private channel, including all its messages and files, within a Slack Enterprise Grid organization.

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Permanently deletes an existing file from a Slack workspace using its unique file ID; this action is irreversible and also removes any associated comments or shares.

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Deletes a specific comment from a file in Slack; this action is irreversible.

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Deletes several items (rows) from a Slack List in one call via `slackLists.items.deleteMultiple`. This operation is ALL-OR-NOTHING: Slack returns a single `{"ok": true}` on success or `{"ok": false, "error": ...}` on failure, with NO per-item result array, so partial state cannot be reported. On failure, treat the who…

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Deletes an existing Slack reminder, typically when it is no longer relevant or a task is completed; this operation is irreversible.

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