metadata_get_applicability_domain

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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and openWorld, so the safety profile is fully covered. The description adds nothing beyond them: no indication of what the configuration contains, whether an unknown model_name errors or returns empty, or any auth/lookup requirement.

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?

A single front-loaded sentence with no filler, so it is concise and easy to scan. Its brevity, however, reflects under-specification rather than disciplined editing.

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?

An output schema exists, so return values need not be explained. Still, for a tool keyed on a free-form model identifier, the description omits how to source valid model names and how it relates to the sibling list tool, leaving a gap an agent must guess around.

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% for the single parameter, and the description only vaguely alludes to it via 'a specific model'. It never clarifies whether model_name is a human-readable name, a model ID, or where the caller obtains a valid value (e.g. from metadata_list_applicability_domain).

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?

States a specific verb (fetch) and resource (applicability domain configuration) scoped to a model, which separates it from the sibling metadata_list_applicability_domain. No explicit sibling callout, but the singular 'for a specific model' scope is clear.

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?

There is no statement of when to use this versus metadata_list_applicability_domain or metadata_get_model_card, and no prerequisites (e.g. you must already have a valid model_name). Usage is only inferable from the tool name.

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