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slack

Search and read Slack messages, channels, and threads to catch up on team discussions and decisions. Using the installed CLI and Slack’s official MCP server, it also supports channel posts and replies, with approval required for changes.

OriginalShow the original description

Read and search messages, channels, and threads in the user's Slack workspace. Use to catch up on team discussions and decisions, post channel messages, and reply to coworkers through Slack's official MCP server.

Works withSlack
See how to install

Good for

  • Catch up on team discussions
  • Find messages about past decisions
  • Post updates to a channel
  • Reply to coworkers in Slack

Files included (3)

  • SKILL.md1.4 KB
  • connector_auth_config.yaml188 B
  • manifest.yaml3.3 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Slack

Use the installed slack CLI. Start with slack status. If it reports not_connected, run slack authorize-url and share only the returned connect_url with the user.

Slack requires a fixed registered app identity and does not support Dynamic
Client Registration. The test app is limited to its development workspace;
the production app must be approved for Slack Marketplace distribution before users from other workspaces can connect.

Run slack list-tools to inspect the reviewed subset of the live provider catalogue and its permission annotations, then call an advertised tool with:

slack call-tool --name <tool> --arguments-json '<json-object>'

Slack's catalogue contains both reads and mutations and can change over time. The CLI allows only explicitly reviewed tools: read operations are allowed by default and mutations require approval with an argument preview. Unknown or new provider tools fail closed. Direct file reads, signed upload URLs, and unreviewed list tools remain unavailable until they have dedicated delivery handling. Never request OAuth tokens or app credentials in chat.

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