This server has a single tool 'execute_skill_action' with critical definition gaps. The tool description is generic (47 chars, below 20-char floor) and provides no actionable guidance on when/why to use it. No input schema is visible in the source code, the tool appears to be a stub that prints JSON but does not actually register parameters, types, or constraints. The client.py file shows a separate Python class (not MCP-integrated) with a method optimize_game_arpu(), but this is NOT exposed as an MCP tool with proper schema. Tool composition is broken: the server claims to support 'execute_skill_action' but the implementation is a no-op print statement. No error handling, no output schema documentation, no parameter descriptions. This is a non-functional MCP server.

• Define a complete JSON Schema for execute_skill_action input parameters: title_id (string, enum of valid game titles), dau_count (integer, min 1, max 10000000), epm_target_usd (number, min 0.01, max 100). Include descriptions for each.
• Rewrite tool description to 100-150 chars explaining: 'Optimize game monetization strategy by calculating hybrid ad/IAP split and projected revenue based on DAU and EPM targets. Returns experiment ID, retention benchmarks, and mediation config.'
• Document output schema with all returned fields: growth_experiment_id (string), title_id (string), hybrid_monetization_split (object with rewarded_video_pct, interstitial_pct, iap_microtransactions_pct), projected_daily_revenue_usd (number), d1_retention_benchmark_pct (number), d7_retention_benchmark_pct (number), automated_waterfall_mediation_active (boolean).
• Implement actual tool execution in mcp_server.py. Wire the client.py optimize_game_arpu() logic into the tool handler, validate inputs, and return structured results. Currently the server is non-functional.
• Add error handling: validate dau_count > 0, epm_target_usd > 0, title_id is known. Return actionable errors like 'Invalid title_id: got "UNKNOWN_GAME", valid titles are: CASUAL_PUZZLE_DASH, HYPER_RUNNER_3D, ...' per pattern:recovery-guide.