Two tools with basic descriptions and minimal parameter documentation. GetAllWorkItemsStatuses has no input parameters (empty schema), CreateWorkItem has three string parameters with descriptions but no type constraints, enums, or validation guidance. No output schemas documented. Descriptions are present but generic (194-char baseline suggests room for improvement). No error handling guidance, no idempotency markers, no security considerations. Tool names follow verb_noun pattern (positive), but lack specificity about what 'work item' means in context.

• Document output schemas for both tools. Example: GetAllWorkItemsStatuses returns {states: [{id: string, name: string, color: string}]}. CreateWorkItem returns {id: string, name: string, state_id: string, created_at: string}. This enables chaining and field extraction.
• Add enum constraint to stateId parameter. Fetch valid states from GetAllWorkItemsStatuses and document: 'One of the state IDs returned by GetAllWorkItemsStatuses (e.g., "todo", "in_progress", "done").'
• Wrap HTTP calls in try-catch and return structured error responses. Example: 'Invalid state ID. Call GetAllWorkItemsStatuses to see available states.' or 'Authentication failed. Check PlaneAPIKey configuration.'
• Add parameter constraints to CreateWorkItem: 'name: 1-255 characters, required. description: 0-10000 characters, optional HTML. stateId: must match a state from GetAllWorkItemsStatuses.'
• Add tool annotations (destructiveHint) to CreateWorkItem to signal it modifies state. Consider adding an optional 'dry_run' parameter to preview the work item before creation.