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

Annotations already declare readOnly, idempotent, non-destructive and closed-world behavior, so the safety profile is covered. The description does add real behavioral content: results are ranked (similarity ordering), limited to 'live' marks (dead/abandoned registrations excluded), and matched phonetically as well as orthographically. It says nothing about result volume, ranking method, or query cost.

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 clause with no filler; every phrase (ranked, live, spelling or sound, three registers) carries information. It is a fragment rather than a sentence, and its extreme brevity is part of why other gaps exist, but nothing in it is redundant.

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 three parameters at 0% schema coverage and no output schema, the description should carry more weight than one line. It omits any sense of what a result looks like (mark text, register, owner, similarity score), how 'limit' behaves, and how registers are combined — all of which an agent must guess.

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%, so the description carries the full burden. It clarifies that 'query' is matched on spelling or sound rather than exactly, and it names the three registers, but 'limit' — including its 1–100 range and default — is entirely undocumented, and there is no guidance on multi-register queries.

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?

Identifies the resource (live trademark marks), the matching basis (shared spelling or sound) and the coverage scope (US, EU, Israeli registers), which is far more specific than the title. It never mentions the sibling check_trademark, so the distinction between exploratory search and a specific lookup must be inferred.

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?

There is no explicit when-to-use or when-not-to-use statement, and the only sibling, check_trademark, is never referenced. An agent can guess this is the discovery tool versus a targeted check, but nothing in the text confirms that routing decision.

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