Feature: Add option to disable 'Sent using Claude' message footer

[demisx]

Problem

Messages sent via the Slack MCP server include a "Sent using Claude" footer that cannot be disabled. For users and organizations with policies against AI attribution in communications, there is no way to opt out of this branding.

Proposed Solution

Add a configuration option (e.g., disable_attribution: true or a parameter on slack_send_message) that allows users to suppress the "Sent using Claude" footer on messages.

Context

• The Slack MCP server is a remote service (mcp.slack.com/mcp), so this behavior is controlled server-side
• Local configuration files (.mcp.json) only contain OAuth/connection settings — no option exists to control message formatting
• Some organizations have strict policies against AI attribution in any external or internal communications

[mwbrooks]

Hi @demisx 👋🏻 Thanks for sharing this feature idea - it sounds reasonable and legit to me. I've shared it with the internal Slack MCP Server team, linked this issue, and I'll share any updates that I hear from the team!

[hankedori]

@mwbrooks any updates on this? We would also appreciate the ability to remove this attribution

[VKuber]

@mwbrooks I think this is a good update. I would like to see this change as well.

[KentaKatoh]

hello @mwbrooks, A new issue has come up. With the current setup, Claude Tag on Slack reacts every time the Slack MCP server posts a message.
https://support.claude.com/en/articles/15594475-what-is-claude-tag

[ryley-reid]

Amazing Idea

[KentaKatoh]

hello @mwbrooks, A new issue has come up. With the current setup, Claude Tag on Slack reacts every time the Slack MCP server posts a message. https://support.claude.com/en/articles/15594475-what-is-claude-tag

This is unexpected behavior. It incurs unnecessary costs.

[Roach]

+1 from me too - hit it today on an internal automation flow where the footer wasn't super appropriate for the channel 😅

[franciscotopo]

This would be very useful!

[JiHoon0422]

Please

[andrewboeger-vivun]

This tag automatically triggers Claude Tag, if it's installed on the workspace.

That means that a message unintended for Claude is now inadvertently giving instructions to Claude... which may or may not have access to numerous tools. This is VERY dangerous!

[joao-afs]

👍

[gtapps]

Any news regarding this issue?