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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states that the tool provides region status, which implies a read-only operation, but it does not mention return formats, caching, permissions, or any other behavioral traits.

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 concise and front-loaded, using a single sentence to convey the core purpose. However, it is a sentence fragment, which slightly detracts from structural completeness.

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?

Given the lack of output schema and annotations, the description needs to provide more detail about what the status represents and how the provider parameter works. It offers purpose and context but leaves significant gaps, making it insufficient for confident tool invocation.

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 schema describes the 'region' parameter but leaves 'provider' undocumented. The description adds no information about either parameter, failing to compensate for the 50% schema coverage gap. The provider parameter's purpose and acceptable values remain unclear.

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 identifies the tool as providing cloud region status, specifically for EU regions and DORA data residency. This distinguishes it from sibling status tools like cloud_status and saas_status, though it lacks an explicit verb like 'get' or 'query'.

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 context of EU regions and DORA data residency implies when to use this tool, but there is no explicit guidance on when not to use it or which sibling alternatives might be better suited. The usage is clear but not fully articulated.

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