fix(SlackToolKit) for get_channel tool - Fixes - langchain-ai/langchain-community/issues/325 #327
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Summary of the problem
Issue: [/issues/325]
Symptom: When following LangChain's Slack tool example (e.g., using the Google AI integration), the Slack toolkit integration errors out.
Diagnosis: [get_channel.py] in the community Slack toolkit does not expose a proper [SlackGetChannelSchema] (other Slack tool modules define an [args_schema] Pydantic model).
Fix: Add a proper SlackGetChannelSchema Pydantic model to get_channel.py. The schema should be explicit, minimal, and safe so it matches the shape that the rest of the Slack tools expose.