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

Annotations cover the safety profile (readOnly, idempotent, non-destructive, openWorld), so the bar is lower. The description adds real substance beyond them: findings are computed from the holder's whole register book, evidence is returned per finding, no legal conclusions are drawn, and PermID corporate identity carries a CC BY 4.0 attribution obligation. It does not describe result shape or any rate/latency behaviour.

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 opening sentence front-loads the purpose well, but the middle sentence is dense with framing rhetoric ('the leverage that gives counsel', 'spray across unrelated classes') that costs tokens without adding callable detail. Three sentences is reasonable in length, but signal density is mixed.

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 does a fair job of telling the agent what comes back (evidence behind each finding, attribution credit). It is nevertheless incomplete on the input side — nothing about the 'name' argument — and gives no sense of result size or how findings are structured.

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 0% for the single required parameter 'name', and the description does not compensate: it never says whether the value is a legal entity name, a trading name, an exact or fuzzy match, or how ambiguous names are handled. The only hint is the recurring word 'holder'.

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 resource (a trademark holder) and states what the read yields: identity, filing behaviour, lapse rate, class clustering. It is clearly a profile/analysis read rather than a list or a search. It never names a sibling (e.g. company_file or run_investigation) to force a routing decision, so it stops short of 5.

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 framing 'the read on an adversary' and 'Free' imply the when: adversarial due-diligence work where cost matters, versus the paid investigation siblings. Usage is only implied, with no explicit when-not and no alternative tool named, so it is adequate but not directive.

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