Get Modelo 418 Summary (IGIC Monthly Large Enterprises)

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and idempotentHint=true. Description adds specific return fields (collected, deductible, net due, carryover), complementing annotations well.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two concise English sentences followed by Spanish translation. Core purpose front-loaded. Bilingual redundancy acceptable; no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Complete for a single-optional-param read tool with full schema coverage, annotations, and output schema. All necessary information provided.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema covers parameter fully with 100% coverage. Description reinforces format with example period='2026-04', but adds no new semantic detail beyond schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

Clear verb+resource+scope: 'Get IGIC Modelo 418 summary' for large enterprises in Canary Islands. Distinguishes from other tax model tools like get_modelo_303_summary.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

States applicable condition: annual turnover exceeds 'grandes empresas' threshold. Provides example period. No explicit alternatives but context implies exclusive use for IGIC large enterprises.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.