Single tool with critical definition gaps. Schema uses invalid JSON Schema type 'list' instead of 'array' (line: tools.py). Description is minimal (34 chars, below 50-char baseline for clarity). No parameter descriptions, 'keywords' lacks context on format, count, or constraints. No output schema documented. Error handling exists but lacks recovery guidance. Tool naming follows verb_noun pattern correctly.

• Fix inputSchema: change 'type': 'list' to 'type': 'array' and add 'items': {'type': 'string'} to specify array element type.
• Expand tool description to 80 - 150 chars: 'Retrieve Google Trends interest levels by geographic region for one or more keywords. Returns CSV with region names and interest scores (0 - 100). Use to analyze geographic demand patterns.'
• Add parameter description for 'keywords': 'Array of 1 - 5 search terms (e.g., ["python", "javascript"]). Each term is a single keyword or short phrase. Longer phrases may reduce result granularity.'
• Document output schema in description or as a separate note: 'Returns CSV with columns: geoName, value. geoName is region/country; value is 0 - 100 interest score.'
• Enhance error messages: 'Keywords required. Provide 1 - 5 keywords as strings.' and 'API rate limit exceeded. Retry in 60 seconds or reduce keyword count.'

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

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