Four tools with complete input schemas and basic descriptions, but significant gaps in parameter documentation and output schema clarity. Tool names follow verb_noun convention (create_todo, mark_todo_done, get_all_todos, delete_todo). Descriptions are present but minimal (10-30 chars), below the 50-200 char LLM-optimized baseline. No parameter descriptions for most inputs, 'id' and 'done' lack context. Output schemas are not documented; responses are text-only without structured field definitions. Error handling is basic (throws generic errors). No tool annotations (destructiveHint, readOnlyHint, idempotentHint). Composition is reasonable (single responsibility per tool), but missing pagination, batch operations, and recovery guidance.

• Expand tool descriptions to 50-200 chars. Example: 'create_todo' → 'Create a new todo item with a title and content. Returns the assigned ID for later reference.'
• Add descriptions to all parameters. Example: 'id: The numeric ID of the todo to modify (returned by create_todo)' and 'done: Boolean flag, true marks complete, false marks incomplete.'
• Document output schemas. Define what fields each tool returns (e.g., create_todo returns {id: string, title: string, created_at: ISO8601}).
• Add tool annotations: mark delete_todo with destructiveHint=true, get_all_todos with readOnlyHint=true, create_todo with idempotentHint=false.
• Enhance error messages with recovery guidance. Example: 'Todo 5 not found. Call get_all_todos to see available IDs (1-3).' instead of generic 'Todo not found'.