pingfusi provides 10 tools with explicit input schemas and descriptions visible in packages/core/index.js and packages/core/ping.js. Most tools follow verb_noun naming conventions (request_review, wait_for_results, get_test_results, draft.push, draft.delete, ping) and have structured input parameters with types. However, several critical gaps limit the score: (1) No documented output schemas for any tool, callers cannot know what fields to expect, making chaining difficult. (2) Descriptions are functional but sparse (ranging 50-180 chars, below the 194-char baseline for A+ tools). (3) Error handling guidance is absent, tools return results but do not document what failures look like, recovery paths, or retry semantics. (4) Parameter descriptions lack format constraints and validation rules (e.g., n_target accepts 1-256 but lacks enum or range notation; max_wait_seconds and timeoutMs have no bounds stated). (5) Tool composition is reasonable but state-file coupling (review.file, review.wait, review.verify) creates implicit dependencies not documented in parameter descriptions. The server is production-grade in API design (stateless, HTTP-based, proper bearer auth), but tool definitions fall short of A-grade LLM-optimized standards.

• Document output schemas for every tool. Example: 'request_review returns {ping_id: string, status: string, created_at: ISO8601}'. Include all fields the LLM will need for downstream calls (e.g., if wait_for_results needs ping_id, ensure request_review returns it).
• Expand tool descriptions to 100 - 200 chars. Include WHEN to use: 'request_review: File a review round and get a tracking ID. Use this first; then call wait_for_results to poll for completion.' Include distinctions: 'Unlike ping (one-off question), request_review is for structured multi-step feedback rounds.'
• Add explicit parameter constraints in schemas. Convert n_target description to 'Target number of reviewers (1 - 256, default 10)' and add a `maximum: 256, minimum: 1` to the schema. Add bounds to max_wait_seconds (e.g., 'Maximum seconds to wait (1 - 300, default 45)').
• Document error modes and recovery. Add to wait_for_results: 'Timeout returns {error: 'timeout', message: 'No results within 45s. Retry with longer max_wait_seconds or check ping_id via get_test_results.' Retryable: yes.' Add to draft.delete: 'Deleting a non-existent draft returns {error: 'not_found'}. This is safe to ignore if cleanup is idempotent.'
• Rename draft tools to snake_case for consistency: draft.push → push_draft, draft.status → get_draft_status, draft.delete → delete_draft. This aligns with verb_noun convention and prevents LLM confusion.
• Consolidate overlapping review workflows. Clarify in tool descriptions which workflow to use: 'request_review + wait_for_results + get_test_results is the simple polling API. review.file + review.wait + review.verify is the stateful workflow for CLI integration.' Add a parameter to request_review: 'workflow: "simple" | "stateful"' or clearly document when to use each pair.