Server has 8 tools with complete schemas and descriptions. Naming follows verb_noun pattern (mundial_get_*, calcular_*, programa_*_info). Descriptions are adequate (100-200 chars, within baseline 194 avg). However, critical gaps: (1) calcular_ingreso_creador has 'pais' parameter marked required=false in code but description suggests it's needed for calculation; (2) no output schemas documented, LLMs cannot plan downstream calls or extract fields; (3) no error handling guidance, API failures return raw HTTP errors with no recovery hints; (4) parameter descriptions lack constraints (e.g., 'Group letter A to L' should be an enum); (5) no pagination support despite tools returning lists (grupos, sedes, selecciones_latam could return 12+, 16+, 8+ items respectively). Tool composition is sound (each does one thing), but output structure is opaque.

• Document output schemas for all 8 tools. Example: mundial_get_grupo should return {group_letter: string, teams: [{name: string, confederation: string}], top_seed: string}. Include in tool description or as a separate outputSchema field.
• Convert 'id' parameter in mundial_get_grupo to enum: {type: 'string', enum: ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L']}. Same for 'slug' in mundial_get_seleccion.
• Add error handling: catch API errors and return structured responses like {error: 'Invalid group letter', valid_options: ['A', 'B', ...], retry: true}. Guide LLM on next steps.
• Clarify calcular_ingreso_creador: either mark 'pais' as required (if FX calculation needs it) or document what happens if omitted (e.g., 'defaults to USD, no FX adjustment'). Add constraint: pais must be one of [argentina, brasil, mexico, colombia, uruguay, ecuador, chile, peru].
• Add pagination to list tools: mundial_get_grupos(limit=12, offset=0) → {groups: [...], total: 12, next_offset: null}. Cap results at 20 items per call to avoid context bloat.