This server provides 25 well-structured GitHub Projects tools with consistent naming patterns and explicit input schemas. Tool definitions are above-average in schema completeness and description consistency, but descriptions are generic and lack LLM-optimized guidance. Most parameters have type definitions and descriptions, reducing confusion. However, output schemas are not explicitly documented in the visible code, and error handling guidance is absent. The server demonstrates good engineering practices (explicit GraphQL operations, Zod validation) but falls short of production-grade LLM tooling patterns around description depth, output documentation, and recovery guidance.

• Expand descriptions to 100-200 characters. Add WHEN to call (e.g., 'Call get-project-fields first to see what columns exist, then call get-project-items to fetch issues'), WHAT it returns (e.g., 'Returns an array of fields with type and name'), and HOW it differs from related tools.
• Document output schemas explicitly. For each tool that returns data, specify the response object structure, field names, types, and any required chaining IDs. Add inline examples or link to schema definitions.
• Add error guidance to descriptions. E.g., 'If you get project_not_found, try list-projects to confirm the project exists. If you get invalid_field_value, call get-project-fields to see valid field types.'
• For the 'value' parameter in update-project-item-field and bulk-update-project-item-field, define the object schema explicitly. Document valid keys based on field type (e.g., for single_select: {optionId: string}, for text: {text: string}).
• Add tool annotations to all tool definitions: set readOnlyHint=true for get-*, readOnlyHint=false and destructiveHint=true for delete-*, and destructiveHint=false for update-*.
• For destructive operations, add a note in the description: 'This action is irreversible. Ensure you have the correct ID before calling.'
• Document pagination behavior in list-projects and get-project-items descriptions. Specify max results per call (100), explain cursor semantics, and state that subsequent calls use the 'after' field from the previous response.
• Add validation rules to parameter descriptions. E.g., 'fieldType must be one of: text, number, date, single_select, iteration' for create-project-field.