Single tool 'execute_skill_action' has critical definition gaps. Description is present (89 chars) but vague, does not explain WHAT skill operations are supported, WHEN to use it, or what the response structure contains. Input schema exists but is severely underspecified: 'query_payload' is a bare string with no format, length, or content constraints. No output schema documented. Tool name uses generic verb 'execute' rather than domain-specific action (e.g., 'match_ugc_creators', 'auction_brief'). No error handling guidance. No parameter validation rules. Fails 6 of 7 critical naming/description/schema checks.

• Rename tool to 'match_ugc_creators_for_brief' to reflect the actual domain operation and follow verb_noun naming convention.
• Replace 'query_payload' string parameter with explicit, typed parameters: brief_title (string, required), target_budget_usd (number, min=1, max=100000), required_creator_count (integer, min=1, max=100). This matches the client.py interface and is self-documenting.
• Document output schema with typed fields: brief_auction_id (string), brief_title (string), creators_matched_and_accepted_count (integer), average_creator_bid_usd (number), total_committed_campaign_spend_usd (number), brief_bidding_auction_portal_url (string).
• Expand tool description to 100-150 chars: 'Match UGC creators for a brief auction. Accepts brief title, target budget per video, and required creator count. Returns auction ID, matched creator count, average bid, and total spend. Call this to launch a creator matching campaign.'
• Add error handling: document failure modes (e.g., 'No creators available for budget', 'Invalid brief title') with recovery guidance (e.g., 'Increase budget or reduce creator count and retry').