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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is fully covered structurally. The description's only added behavioral context is the time window (overall vs last 24 hours); it says nothing about rate limits, cache freshness, or when the counters are computed.

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?

A single front-loaded sentence that enumerates the returned aggregates without padding. Every clause earns its place.

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 an output schema present and annotations covering the safety profile, the description need not explain return values. It is largely complete for a parameterless stats tool, though it omits any cross-reference to the sibling YARA tools that cover the same data at a different granularity.

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 there is no per-parameter semantics to document; the baseline for a parameterless tool is 4. The description correctly adds no parameter noise.

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?

Specific verb+resource ('Get YARA statistics') with added scope detail: overall vs last-24-hour matches, severity/category distribution, and top threats. This clearly describes an aggregate stats tool, but it never distinguishes itself from siblings such as get_yara_by_scan, get_yara_matches, or get_recent_yara_threats.

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?

No explicit when-to-use guidance and no mention of alternatives. The 'across the archive' phrasing implies a dashboard/overview use case, but the agent must infer this and cannot tell from the description why it should pick this over get_yara_matches or get_recent_yara_threats.

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