Spelungit defines 5 tools with moderate quality. All tools have descriptions and basic input schemas with type definitions, placing them in the mediocre-to-fair range. Naming is clear and verb-based (index_, search_, get_, list_). However, multiple critical issues prevent a higher score: (1) Parameter descriptions are minimal or missing detail about constraints and formats. (2) Output schemas are completely undocumented, there is no visible response schema for any tool, forcing LLMs to infer output structure. (3) Error handling is not evident in the visible code, no recovery guidance, no error categorization, no actionable error messages shown. (4) The 'repository_path' parameter is widely used but lacks guidance on absolute vs relative paths, validation rules, or examples. (5) The 'limit' parameter in search_commits has no min/max bounds specified. Naming and descriptions are present, so the server avoids an F grade, but the absence of documented response schemas and sparse parameter validation keeps it in the C/D range.

• Define explicit output schemas for all tools. At minimum, document the fields returned by each tool as JSON Schema. For example, search_commits should document: [{commit_sha: string, message: string, author: string, timestamp: string, ...}]. This allows LLMs to plan downstream calls and extract the right fields.
• Add bounds and constraints to numeric parameters. 'limit' in search_commits should be '1-100 (default 10)' to prevent runaway requests. Add min/max constraints to schema and description.
• Enhance parameter descriptions with format and validation rules. For 'repository_path': 'Absolute or relative path to the Git repository. Must be a valid directory containing a .git folder.' For 'commit_sha': 'Full 40-character SHA-1 hash of the commit (e.g., a1b2c3d4e5f6...). Short hashes are not accepted.'
• Add pagination to list_repositories with 'limit' (1-100, default 20) and 'offset' parameters. Document max result limits and guidance on discovering all repositories across multiple calls.
• Document error handling and recovery paths. Add to tool descriptions: 'If the repository is not indexed, call index_repository() first.' If a commit is not found, return available SHAs or guidance on how to search.
• Clarify optional parameters and fallback behavior. For search_commits, explicitly state: 'If repository_path is omitted, searches all indexed repositories. To limit to one, provide an explicit path.'
• Add per-tool timeout and resource guidelines. Note that index_repository may take minutes for large repos; offer a status check with get_repository_status to monitor progress without blocking the agent.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry