This MCP server implements 9 tools for interacting with Infomaniak kChat. Tools use clear verb_noun naming conventions (kchat_list_channels, kchat_post_message, etc.) and all have descriptions. Input schemas are present for all tools with Zod validation. However, there are significant gaps: output schemas are not documented, error handling is minimal (most tools just stringify API responses), and parameter descriptions lack actionable context about constraints and formats. The tool interface is well-structured but production-grade error guidance and output documentation are missing.

• Document output schema for every tool in code comments and via capability metadata. Specify which fields the response includes (e.g., channel_id, channel_name, created_at), their types, and when they are present. This enables agents to plan multi-step sequences.
• Add structured error responses. Instead of raw error strings, return JSON objects with error code, message, and recovery suggestion: {error: 'user_not_found', message: 'Username not found', suggestion: 'Try search_users() with a partial name'}.
• Add tool annotations via the MCP SDK. Mark write tools with destructiveHint=true, read-only tools with readOnlyHint=true, and idempotent operations with idempotentHint=true. This allows clients to apply safety policies.
• Enhance parameter descriptions with validation rules. E.g., emoji_name: 'The name of the emoji reaction (e.g., +1, heart, thumbsup). Available emoji are returned by get_emoji_list(). Names are case-sensitive.'
• Add a confirmation step for irreversible operations. For kchat_post_message and kchat_send_direct_message, implement a dry_run parameter or a separate preview_message tool that shows exactly what will be sent before posting.
• Document pagination semantics. Clarify whether limit+page or offset-based pagination is used, what total_count means, and whether there is a next_cursor for stateless iteration.
• Add helper tools for discovery. A get_emoji_list() tool would allow agents to explore valid emoji names before calling kchat_add_reaction, reducing invalid inputs.