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

Annotations already declare readOnlyHint=true, and the description adds that the tool is 'Deterministic, with source URL' and lists exactly what content it returns (confirmed/unconfirmed facts). This is valuable context beyond the annotation, but it doesn't contradict and the annotation already covers the safety aspect. No missing behavioral detail is critical for a read-only info tool.

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?

The description is a single sentence but packs all key information: content scope, deterministic nature, source URL, and parameter guidance. It is front-loaded with the main purpose and has zero fluff.

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?

For a simple, read-only tool with one optional parameter and an output schema, the description covers all essential aspects: what it returns, behavior (deterministic with source), and parameter usage. Since output schema exists, return format details are unnecessary. Nothing an agent needs to invoke it correctly is missing.

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 description coverage is 0%, so the description must compensate. It explicitly enumerates the allowed values for 'lang' (en, de, es, pt, fr, tr, ar), which the schema itself does not provide. This fully specifies the only parameter and leaves no ambiguity.

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?

The description clearly states the tool provides confirmed GTA 6 release facts, listing specific content areas (date, platforms, preload, prices, unconfirmed details). It uses a specific verb ('provides') and resource ('release facts'), and the content is distinct from sibling tools like gta6_countdown or gta6_sources, so an agent can easily differentiate it.

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?

The description gives clear context on what the tool is for (release information) without explicitly naming alternatives or exclusions. It does provide guidance on the 'lang' parameter (allowed values), which is usage-relevant. Although it doesn't say 'use this when X instead of Y', the context is unambiguous enough for a simple lookup tool.

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