Strong foundation with 27 well-named tools following verb_noun convention. All tools have descriptions (avg 95 chars) and input schemas with typed parameters. Descriptions are functional but brief, most lack WHEN/WHY context or dependency hints. Parameter descriptions are present but generic; many lack format constraints or validation guidance. Output schemas are not documented in visible code. Error handling is minimal, no recovery guidance or categorization. Security is solid (no secrets in params, env-based auth). Composition is good (single responsibility, chainable IDs), but some tools could batch operations.

• Document output schemas for all tools. Include field names, types, and which fields are required for chaining (e.g., get_merge_request must return mr_iid, project_id, head_sha for downstream tools).
• Enhance descriptions with WHEN/WHY context: 'Get full MR details (title, state, author, approval count). Use this to check approval status before approve_mr, or to retrieve head_sha for safety checks. If you only have a branch name, use source_branch parameter.'
• Add error recovery guidance to write tools: 'If approval fails with "SHA mismatch", call get_merge_request to fetch the current head_sha and retry. If it fails with "Insufficient permissions", the user lacks approval authority.'
• Specify parameter constraints in descriptions: 'excluded_file_patterns: array of regex strings (e.g., ["package-lock\\.json", ".*\\.generated\\..*"]). Patterns are matched against file paths; use .* for wildcards. Max 10 patterns.'
• Add tool annotations (readOnlyHint, destructiveHint) to schema for protocol compliance: mark get_* tools as readOnly, delete_mr_note as destructive, approve_mr as idempotent.

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

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