Server has 8 well-named tools with consistent verb_noun patterns (slack_get_*, slack_list_*, slack_search_*). All tools have descriptions (avg ~120 chars, within baseline 34-392). Input schemas are present and use Zod validation with proper types. However, parameter descriptions are sparse or missing in several tools (e.g., slack_list_channels 'filters' param lacks description; slack_search_messages 'query' param description is minimal). Output schemas are not documented, LLMs cannot predict response structure. Error handling is absent from visible code. No tool annotations (readOnlyHint, destructiveHint). All tools are READ_ONLY per risk field, but this is not declared in schema.

• Document output schemas for all 8 tools. Include field names, types, and examples. E.g., slack_get_me returns {user_id: string, name: string, is_bot: boolean}. This enables LLMs to chain tools and extract correct fields.
• Add descriptions to all parameter objects. For slack_list_channels, add: 'filters: Optional object to constrain results by channel type, sort order, and pagination.' For slack_search_messages, clarify: 'query: Free-text search string or Slack message URL. If omitted, returns recent messages.'
• Add readOnlyHint: true to all 8 tools in schema. This signals to agents that these tools are safe to call without confirmation and can be retried on failure.
• Implement error handling with recovery guidance. Wrap session calls in try-catch. Return structured errors: {error: 'channel_not_found', message: 'Channel C123 not found. Try slack_list_channels() to find available channels.', retryable: false}.
• Document pagination behavior in tool descriptions. E.g., 'Returns up to 100 messages. Use cursor from response to fetch next page. Pagination is cursor-based, not offset-based.'