Five tools with clear verb-noun naming (get_*, discover_*) and basic descriptions. All tools have input schemas with type definitions. However, parameter descriptions are minimal or absent, output schemas are undocumented, and error handling guidance is missing. Descriptions average ~60 chars (below the 194-char baseline for A+ tools). No tool annotations (readOnlyHint, idempotentHint). Tools are READ_ONLY but this is not formally declared in the schema. Parameter constraints (enums, ranges) are absent. Output structure is inferred from code examples but not formally documented in tool definitions.

• Add enum constraints to get_pricing 'product' parameter: {"enum": ["data_api", "inventory_api", "audience_api", ...]} with description 'Product identifier. Valid values: data_api, inventory_api, audience_api, etc.'
• Document discover_inventory output schema: 'Returns {"total": integer, "screens": [{"device_id": string, "name": string, "venue_type": string, ...}], "next_cursor": string|null}'. Add min/max to limit parameter: 'Maximum number of screens to return (1 - 1000, default 20).'
• Add readOnlyHint: true to all five tool schemas to signal they are safe to retry and have no side effects.
• Document get_live_audience error cases: 'Returns error if screen_id not found or audience data unavailable. Retry with exponential backoff; if persistent, verify screen_id via discover_inventory.'
• Add parameter descriptions for get_billing_status and get_usage_summary (currently empty input objects). Document what fields are returned and when to call each tool relative to the other.