Bug type

Regression (worked before, now fails)

Summary

When using Slack in Socket Mode, tool calls that require a channel parameter
(e.g. reactions.add, file upload) fail because the channel ID is not forwarded
to the agent's tool context.

• OpenClaw: v2026.3.3
• Channel: Slack Socket Mode
• OS: macOS

Steps to reproduce

1. Configure OpenClaw with Slack Socket Mode ("mode": "socket")
2. Ask the agent to add a reaction to a message, or send an image file
3. Agent attempts the tool call but reports channel:<id> is unavailable

Expected behavior

The channel ID and message timestamp from the Slack event payload should be
available in the tool context, allowing reactions.add and file upload to work.

Actual behavior

Tool call fails. Agent confirms: "channel ID is not being passed through."
Channel: Slack Socket Mode

OpenClaw version

v2026.3.3

Operating system

macOS　26.3.1

Install method

Docker Compose (self-hosted)

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response