Needlex has 9 tools with complete input schemas and descriptions, but quality is inconsistent. Tool names follow verb_noun convention (web_crawl, web_query, web_read, web_replay, web_diff, web_proof, web_prune, memory, analytics). Descriptions exist but are brief (10-80 chars) and lack actionable context for LLM selection. Parameters have types but most lack individual descriptions, e.g., web_crawl's 'profile', 'user_agent', 'retrieval_effort', 'render', 'config_path' are undescribed. No output schemas documented. Error handling is minimal, code shows basic error returns but no recovery guidance. Security concerns: web_crawl and web_query accept 'config_path' as a parameter, risking path traversal. No tool annotations (readOnlyHint/destructiveHint) despite clear risk distinctions (web_prune and memory are WRITE operations). Composition is reasonable, tools are single-purpose, but chaining is unclear without documented output schemas.

• Add 50-150 character descriptions to every parameter. Example: 'profile (string): Rendering profile (e.g., desktop, mobile). Defaults to desktop.' instead of omitting it.
• Document output schemas for all tools. Example: web_crawl returns {urls: [string], content: [string], depth_reached: int, total_pages: int}. Use JSON Schema in tool definition.
• Expand tool descriptions to 80-150 chars with WHEN and RETURN hints. Example: 'Retrieve proof records (audit trail) for a chunk, proof, or trace by ID. Returns proof_chain with timestamps and validation status. Use after web_crawl to verify content authenticity.'
• Add tool annotations: readOnlyHint=true for web_crawl/web_query/web_read/web_replay/web_diff/web_proof/analytics; destructiveHint=true for web_prune; idempotentHint=true for web_read/web_replay.
• Validate config_path parameter: reject paths containing '..', '/', or absolute paths. Accept only filenames from a known config directory. Document the constraint in the parameter description.