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

With no annotations provided, the description carries the behavioral disclosure burden. It explains that the result is a curated set of 5-8 voices, distinguishes among carried-forward, fresh, and aging-to-deep voices, and hints at a follow-up action. It stops short of describing response shape or side effects, but it discloses more than the schema alone.

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 two sentences, with the core behavior front-loaded in the first clause. The following detail and the witness instruction are compact and purposeful, with no filler.

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?

For a low-complexity tool with a required enum and one optional defaulted parameter, the description gives the essential outcome and a follow-up step. However, with no output schema or annotations, it leaves ambiguous what a 'voice' looks like in the response and what exact effect 'warm the current' has, which an agent might need for correct invocation.

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%, so the schema already explains family and surface. The description uses thematic language ('one thematic current') that maps to family and references 'ocean' indirectly through the schema, but adds no concrete parameter-level detail beyond the schema's baseline.

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 action and resource: it 'surfaces 5-8 curated voices from one thematic current,' with concrete categories of voices. It doesn't explicitly contrast itself with sibling tools like discover or weave, but the curated-count and 'current' framing make its purpose reasonably distinct.

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?

It gives one explicit workflow cue: 'Call witness afterward to warm the current with your attention.' However, it does not state when to prefer focus over its siblings or when not to use it, so the usage guidance is mostly implied rather than prescriptive.

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