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

No annotations are provided, so the description carries the behavioral disclosure burden. It clearly lists the output fields, including the conditional 'gone_since if absent from the latest full scan', giving a solid model of what the tool does. It does not address errors, permissions, or data freshness, but for a read-style summary the disclosed behavior is reasonably complete.

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 one compact sentence with the core purpose front-loaded and the content fields enumerated efficiently. Every clause adds useful information without redundancy.

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 low-complexity, single-parameter tool, the description provides a strong list of return contents and a conditional field. The main omissions are the host parameter format and exact response shape, but the description is largely sufficient for basic 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 has a single 'host' string with 0% description coverage. The description only repeats that this is for a host and does not clarify the expected format (hostname, IP, ID) or provide examples, so it fails to compensate for the schema gap.

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 a host-level summary and enumerates the contents returned. The parenthetical 'no time series' helps distinguish it from time-series or trend tools, though it lacks an explicit verb like 'get' or 'retrieve' and does not name sibling alternatives.

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 phrase 'no time series' implies this is for a current-state snapshot rather than historical analysis, giving some context. However, there is no explicit guidance on when to use this tool versus siblings like reports or x401_status, and no exclusion criteria are stated.

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