Notes KB has clear, action-verb naming (add_note, get_note, list_notes, search_notes, find_connections, summarize_topic) and reasonable descriptions (avg ~120 chars). All 6 tools have input schemas with typed parameters and descriptions. However, output schemas are not formally documented, responses are free-text strings rather than structured objects. Error handling is minimal (e.g., 'No note found' messages are helpful but lack recovery guidance). Parameters lack constraints (enums, ranges, length limits). The store.py implementation is incomplete in the provided code (find_connections function is cut off), making full validation impossible. Overall: functional but below production grade.

• Convert all tool responses from free-text strings to structured JSON objects. E.g., list_notes should return {"notes": [{"title": "...", "tags": [...], "created": "..."}], "total": N, "limit": 20}.
• Add pagination to list_notes, search_notes, and find_connections. Accept 'limit' (default 20, max 100) and 'offset' parameters. Return 'total' count and 'has_more' flag.
• Add parameter constraints: tag and query should have max length (e.g., 256 chars). Document expected formats in descriptions (e.g., 'tag: lowercase alphanumeric, 1-50 chars').
• Enhance error messages with recovery guidance. E.g., 'No note found with title "xyz". Try search_notes("xyz") to find similar notes, or list_notes() to see all available notes.'
• Document output schemas explicitly in tool descriptions. Specify the structure of returned objects, field types, and what each field represents.