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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description adds the meaningful behavioral detail that the data is scoped to 'the last 30 days' and states what the report contains. It stops short of noting empty-result behavior or data freshness/latency, but adds real context beyond the structured fields.

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?

Two short sentences, front-loaded with the resource and time window, followed by a one-clause use case. Nothing is repeated and no wording is padding.

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, the description carries the burden of describing the return value, and it does so adequately by listing counts, worst addresses, categories and countries. Only minor gaps remain (empty-report behavior, whether counts are per-address or per-report).

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?

Only one parameter and schema coverage is 100%, with the schema already explaining the AS prefix optionality (AS14061 or 14061). The description reinforces the single-ASN scope but adds no format or validation meaning beyond the schema, 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?

The description names a specific verb and resource ('Abuse reported against one autonomous system') and enumerates the payload: reported/blocklisted address counts, worst addresses, attack categories, countries. That is enough for an agent to distinguish it from generic lookups like check_network or get_country_report, though no sibling is named explicitly.

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 closing clause ('Useful to judge a hosting provider or ISP') implies a use case but gives no explicit when-to-use/when-not guidance and never contrasts this with check_network or get_country_report, which an agent could plausibly pick instead.

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