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

No annotations exist, so the description must disclose behavior itself, and it does: the response is a lean summary with a named envelope and an enumerated field list, and the exact filter/sort grammar is spelled out. Gaps remain on permissions, rate limits, and whether results are cached or eventually consistent — but the shape of the operation is fully legible.

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?

Front-loaded and dense with no filler — scope first, then fields, then filtering, then the getMalware handoff. The operator-grammar block is reproduced almost verbatim from the fieldFilters schema description, which is redundant, and the single long paragraph would read better segmented.

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?

There is no output schema, and the description compensates by naming the envelope and enumerating the item fields, so an agent knows what comes back. For a six-parameter filtered-list tool with a nested fieldFilters object, the description leaves nothing essential unstated.

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?

Despite 100% schema coverage, the description adds meaning the schema lacks: concrete filter prefixes (name:, uuid:, desc:), the valid sort keys including the trending_<N><m|h|d> syntax, and the non-obvious constraint that timestamps accept only __gte and __lt with a half-open range pattern. That last point is exactly the kind of trap an agent would otherwise fall into.

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?

"List and filter Mallory malware" is a specific verb plus resource, and the response envelope is stated outright as {items,total,offset,limit}. The final sentence explicitly contrasts it with getMalware, so an agent can separate the list path from the detail path without opening a schema.

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?

"Pass an item's identifier to getMalware for the full detail object" gives an explicit alternative and the condition that selects it. It does not address when to reach for other list* siblings or when prefix search should win over fieldFilters, but the primary routing decision is covered.

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