get_resource_groups_count

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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint, so the safety profile is covered. The description adds useful context by clarifying that the count is limited to resource groups visible in the authenticated scope, which is meaningful behavioral information beyond the structured hints.

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, front-loaded sentence with no filler. Every word adds meaning: the action, the object, and the scope are all included compactly.

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 zero-parameter count tool with annotations covering read-only and idempotent behavior, the description is nearly complete. It clearly states what is counted and the applicable scope; only a more explicit indication of the response format (e.g., integer) is not present, though 'quantidade' already implies it.

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?

The tool has zero parameters and the schema coverage is 100%, so there is no parameter information for the description to supplement. The baseline for no parameters is 4, and the description adds no unnecessary param details.

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 action ('Retorna a quantidade') and the resource ('Resource Groups'), plus the scope ('visíveis no escopo autenticado'). It is easily distinguished from sibling tools like list_resource_groups because it explicitly indicates a count rather than a list.

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 no guidance on when to choose this count tool over alternatives such as list_resource_groups or get_subscriptions_count. The intended use case is implied by the name and phrasing, but there is no explicit when-to-use or when-not-to-use instruction.

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