nexalayer_check_status

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

Annotations already cover readOnly, idempotent, and non-destructive, so the description's job is lower. It adds genuinely useful operational context beyond them: no API key required, no charge, and the correct behavioral response to a non-operational component. It does not mention caching, rate limits, or freshness of incident history.

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?

Four sentences, front-loaded with purpose, then return shape, then the decision rule, then the access/cost note. All content earns its place, though the full enum enumeration is slightly long and the closing 'No API key needed; no charge' could be folded in.

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?

With no output schema and no parameters, the description carries the return-value burden itself and does so: component names, the five possible statuses, and incident data. Combined with annotations covering the safety profile, an agent has everything needed to call and interpret this tool correctly.

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 takes zero parameters, so the baseline is 4 per the rubric. The description correctly implies a no-argument invocation via "No API key needed; no charge" and adds no misleading parameter hints.

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 ("Check NexaLayer service status") and enumerates exactly what comes back: per-component states (api, sessions, billing, catalog, upstream_network), active incidents, and incident history. The enum vocabulary and the 'wait and retry later instead of reporting an issue' framing implicitly separate it from report_issue and known_issues siblings.

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?

Gives clear when-to-use context ("before retrying or filing a ticket") and a concrete when-not action ("wait and retry later instead of reporting an issue"), which routes the agent away from report_issue. It stops short of naming the sibling tools explicitly, so it is a strong 4 rather than a 5.

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