RepoPrimer demonstrates solid tool design with clear naming, comprehensive parameter schemas, and structured output. All four tools follow verb_noun convention (list_, get_, search_). Descriptions are present and actionable (avg 150 chars). Input schemas use Zod with proper type constraints, enums, and ranges. Tool annotations (readOnlyHint, idempotentHint) are correctly applied. However, output schemas are not formally documented in the code, only inferred from success() helper. Error handling returns plain text messages without recovery guidance or categorization. Parameter descriptions could be more explicit about constraints (e.g., maxChars ranges stated but not in descriptions). No batch operations or pagination cursors despite list_projects potentially returning many items.

• Document output schemas explicitly. Add a 'returns' section to each tool describing the structuredContent shape: list_projects returns {schemaVersion, registryPath, projects: [{id, label, root, documentsPresent, documentsConfigured, taskCounts}], truncated, warnings}. This enables LLMs to plan downstream operations.
• Enhance error messages with recovery guidance. Instead of 'Project not found', return 'Project not found. Call list_projects to see available projects.' Categorize errors as retryable (network timeout) vs user-fixable (invalid project id).
• Add pagination support to list_projects. Accept offset/limit or cursor parameters and return a next_cursor field. Document the default limit (100) and max (200) in the description.
• Move constraint details into parameter descriptions. E.g., 'Maximum characters to include in context (1500-50000; default 10000)' instead of relying on schema min/max alone.
• Clarify search_project behavior for global queries. Document result ordering (relevance? alphabetical?), the global limit, and whether results include project_id for disambiguation.