Post Message

v1Verified

slack.post_message

communicationgeneral

Posts a message to a Slack channel or DM via the Slack Web API. Supports Block Kit for rich formatting and attachments.

Technical Specs

External Calls

https://slack.com/api/chat.postMessage

Data Classification

general

MFA Timeout

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Enforcement

Rust / fail-closed

Add this snippet to your agent manifest file to enable this tool.

{
  "tools": [
    {
      "name": "slack.post_message",
      "version": "1"
    }
  ]
}

9 agents currently use this tool

All calls are logged to the tamper evident audit chain

Ed25519 signed descriptor

Rust enforcement, fail-closed

Every call logged to tamper evident chain

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MFA not required

Use this tool in your agent. Sign in to add it to a new or existing agent.

Via CLI

agentsight tool add \
  --name slack.post_message \
  --version 1