Single tool 'execute_skill_action' has critical definition gaps. Description is present (94 chars) but vague, does not explain WHAT operations it performs, WHEN to use it, or what it returns. Input schema exists with one parameter 'query_payload' (type: string) but lacks any constraint, format, or example guidance. No output schema documented. Parameter description is generic ('Input execution payload') and does not specify format, expected structure, or valid values. Tool name uses verb but is overly generic ('execute_skill_action' could mean anything). No error handling guidance. Composition is unclear, tool appears to be a catch-all wrapper rather than a focused, single-responsibility operation. Baseline: 100% of A+ tools have documented return types; 94% have param descriptions; avg tool description 194 chars. This tool falls well short.

• Replace generic 'execute_skill_action' with specific verb_noun names reflecting actual operations (e.g., 'predict_delivery_exception', 'check_milestone_compliance'). Align with client.py's predict_delivery_milestones() method.
• Document output schema explicitly. Based on client.py, return object should include: milestone_id (string), shipment_id (string), predicted_delay_hours (integer), proactive_customer_notification_triggered (boolean), adjusted_eta_timestamp (ISO 8601 string), apology_credit_granted_usd (number), tracking_milestone_url (string).
• Expand tool description to 150 - 250 chars explaining: 'Predicts post-purchase delivery exceptions (delays, compliance issues) for a shipment. Returns delay forecast, proactive notification status, adjusted ETA, and compensation credit. Call this when a shipment status changes or exception is detected.'
• Add enum constraint to 'query_payload' or split into typed parameters: shipment_id (string, required), carrier (enum: FEDEX|UPS|USPS|DHL), current_status (enum: WEATHER_DELAY_DENVER_HUB|...). Document expected format and valid values.
• Add error handling: return structured errors with recovery hints. E.g., 'Shipment not found. Verify shipment_id format (shp_XXXX) and try again.' Include per-item success/failure for batch operations.