defender_get_ip_statistics

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

The annotations already declare readOnlyHint=true and destructiveHint=false, so the description isn't required to restate that. It adds the scope ('in this organization') and the return fields (first and last seen), but does not disclose how prevalence is computed, whether results are bounded, or any permission/rate-limit context. That is moderate value beyond annotations, so a 3 is appropriate.

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 a single, front-loaded sentence. It states the operation, object, scope, and additional output in 15 words, with no redundant phrases.

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 URL, the description carries the burden of explaining the return value. It mentions prevalence and first/last seen, but 'prevalence' is left ambiguous (count? percentage? affected machines?), and there is no mention of time ranges, pagination, or unsupported IP formats. For a simple one-parameter read-only tool this is only mildly incomplete, so a 3.

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%: the only parameter, 'ip', is already described in the schema as 'IP address.' The tool description merely repeats 'IP address' without adding format constraints (e.g., IPv4 vs IPv6), normalization, or matching behavior. 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 uses a specific verb and resource ('Get the prevalence of an IP address') and adds scope ('in this organization') plus return details ('with first and last seen'). It clearly distinguishes from sibling tools like defender_get_ip_alerts or defender_get_file_statistics, which focus on different data.

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 description provides no guidance on when to use this tool over alternatives. It does not name sibling tools or conditions (e.g., 'use defender_get_ip_alerts for IP-related alerts'). The usage context is only implied by the tool's name and the phrase 'in this organization', which isn't enough given the large sibling set.

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