CyberEdu MCP provides 20 tools with generally complete schemas and descriptions. Tool naming follows verb_noun conventions consistently (cyberedu_set_session_cookie, cyberedu_list_challenges, cyberedu_get_challenge, etc.). All tools have non-empty descriptions (baseline: 100% have descriptions). Input schemas are properly structured with type definitions and required field declarations. However, several gaps reduce quality: (1) descriptions vary in LLM-optimization, some are verbose while others lack context about when/why to call the tool; (2) parameter descriptions are present but some lack detail about constraints, ranges, or format; (3) output schemas are not documented, LLMs cannot know what fields will be returned; (4) error handling guidance is absent, tools do not indicate what to do on failure or how errors are classified; (5) no tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear WRITE vs READ_ONLY risk levels in metadata. Per-tool analysis: naming is consistently strong (100% verb_noun), descriptions average ~180 chars (within baseline 194), schemas are well-formed with types, but descriptions lack LLM-optimization hints for multi-tool scenarios (e.g., 'Call cyberedu_list_tenants first to see available options' is missing from cyberedu_switch_tenant).

• Document output schemas for all 20 tools. Create a response object definition (e.g., in the source code or README) that lists returned fields, types, and whether they chain to downstream tool parameters. Example: 'cyberedu_get_challenge returns {challenge_id (string), category (string), difficulty (string), files (array of {file_id, name, size}), ...}'. Verify that file_id from get_challenge can be passed to download_file.
• Add tool annotations to the MCP tool registration. For READ_ONLY tools, include readOnlyHint: true. For WRITE tools (set_session_cookie, switch_tenant, submit_flag, start_service, etc.), add destructiveHint: true and, where applicable, idempotentHint: true (e.g., set_session_cookie is idempotent, calling it twice with the same cookie has no additional effect). Reference: MCP spec section on tool annotations.
• Enhance error handling guidance in descriptions. Add statements like: 'Returns 401 Unauthorized if session is invalid, call cyberedu_set_session_cookie with a fresh cookie. Returns 404 if challenge does not exist, use cyberedu_list_challenges to verify the ID.' Categorize errors: retryable (network timeout, 429 rate limit), user-fixable (invalid ID, expired session), fatal (auth failure, server error).
• Add constraints and enums to filter parameters. For cyberedu_list_challenges, specify valid 'difficulty' values (e.g., enum: ["easy", "medium", "hard", "expert"]). For skip/limit, add min/max bounds (e.g., 'limit: min=1, max=100'). For category, list or link to available categories.