Three tools with consistent high-quality descriptions and partial schemas. All tools have excellent descriptions (150-400 chars, well above baseline 194 char average) that include when to use them, prerequisites, and error guidance. All three are properly named with action verbs (get_*). Schemas are present with typed parameters and descriptions, though output schemas are not explicitly documented, responses are returned as JSON strings rather than structured objects. Tool annotations (readOnlyHint, idempotentHint) are correctly applied. Parameter descriptions are detailed and include format guidance (e.g., Android bundle ID format, preset strings for percent_growth). The primary weakness is the lack of explicit output schema documentation and pagination guidance for list-like results.

• Document output schemas for all three tools. Include example response structures showing field names, types, and meanings. For get_growth, document fields like 'growth_values', 'volume', 'periods'. For get_time_series, document 'data_points', 'timestamps', 'volumes'. For get_top_trends, document 'items', 'rank', 'prev_rank', 'rank_change' etc.
• Add pagination guidance to get_top_trends description: 'Returns up to <limit> results. Use offset to page through results. Total count is returned in the response.' Clarify whether offset/limit are supported on all feed types or only some.
• Enhance error handling with structured categorization. Update _post() and tool descriptions to distinguish retryable errors (rate limit: wait and retry) from user-fixable errors (invalid keyword format: check spelling) from fatal errors (API unreachable: contact support). Return error codes or classifications, not just messages.
• Reduce parameter redundancy in keyword descriptions. _KEYWORD_GROWTH and _KEYWORD_SERIES are nearly identical. Consolidate into a single constant and reuse to reduce maintenance burden and ensure consistency.
• Add a dry_run or preview parameter to tools that might be expensive (optional, defaults to false). This allows agents to validate requests before executing them.
• Document rate limits and quota behavior in the server description. Include guidance on how to interpret quota-exceeded responses and when to retry.
• For get_top_trends, explicitly list which feed types support the 'category' parameter. Current description says 'always pass category' for specific types, but does not clarify what happens if you pass category on unsupported types or omit it when required.