Single tool with adequate schema and description, but missing critical parameter descriptions and output schema documentation. Tool name follows verb_noun pattern (mysql_execute_read_query). Description is 156 chars, within baseline range (p10=34, p90=392). However, 'params' parameter lacks type specificity (additionalProperties: true is too permissive), and no output schema is documented. The 'explanation' parameter is unusual and not justified in the description. Error handling is present in code but not reflected in tool definition.

• Document the complete output schema in the tool description or as a separate schema field. Example: 'Returns {column_names: [string], data: [object], row_count: integer, execution_time_ms: integer}'. This enables LLMs to extract and chain results.
• Replace 'params' with explicit parameter definitions or add a description explaining the structure: 'params: object with keys matching SQL placeholders (e.g., {user_id: 123, status: "active"}). Values must be JSON-serializable.'
• Clarify the 'explanation' parameter: either remove it if it is only for logging, or document its purpose: 'explanation: string, required for audit trails. Describe why this query is needed and how it advances the goal.' If it is audit-only, move it to server-side logging, not a tool parameter.
• Add error handling guidance to the description: 'Errors: Invalid SQL syntax (retryable, fix query), permission denied (non-retryable), connection timeout (retryable). On error, the response includes the error message and suggested fix.'
• Add bounds to max_rows: 'max_rows: integer, range 1 - 1000, default 20. Limits result set to prevent context window exhaustion.'

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

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