iaas_get_regions

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is fully covered structurally. The description adds nothing beyond that - it restates the annotation title ('GET /iaas/api/regions') and gives no detail on scope, pagination behavior, or what 'all regions' means across cloud accounts.

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?

It is short and front-loaded, but 'Get regions' and 'Get all regions' are redundant and the raw endpoint line repeats the annotation title. No sentence is actively harmful, but the duplication costs it a point.

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 list endpoint with full schema coverage, annotations covering safety, and no output schema, the definition is nearly sufficient to call correctly. The remaining gap is scope ambiguity - whether 'regions' are cloud-account regions or platform regions - which an agent must infer.

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 100% and all three optional parameters (top, skip, apiVersion) are documented in the schema. The description adds no parameter meaning beyond that, so the baseline 3 applies.

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 and resource ('Get regions', 'Get all regions'), which distinguishes it from the singular iaas_get_region sibling by implying a list operation. It does not explicitly name any sibling or scoping distinction, so it falls short of a 5.

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 explicit when-to-use guidance, no exclusions, and no mention of alternatives such as iaas_get_region (single region) or iaas_enumerate_*_regions_async (discovery). Usage is only implied by 'Get all regions'.

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