[FEATURE] allow slack MCP to unsave messages

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I use claude as a partner to go through my slack messages. I have hundreds of 'saved for later' messages that i want to walk through with claude and allow it to unsave them to work through my list. however claude isnt able to unsave messages for me.

Proposed Solution

I would like to be able to say 'claude can you mark this message as unsaved' so i can continue through the lsit

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

CLI commands and flags

Use Case Example

I am working through my hundreds of slack messages and want to just use claude to go through them and not have to click over to slack to unsave the messages.

Additional Context

_No response_