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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false, and destructiveHint=false, so safety and determinism are covered. The description's 'Deterministic: the same input always yields the same Shoren' largely restates idempotentHint, and the return shape restates the existing output schema, so it adds little beyond the structured data; the verb-marking rule is behavioral but is also present in the schema.

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 with the purpose, followed by behavioral notes and the return shape; every sentence is short and the verb-marking example is concretely useful. Slight redundancy with annotations/schema keeps it from a 5.

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 one fully documented parameter, an output schema that already defines { translation }, and annotations covering the safety profile, the description supplies the remaining flavor context and an example. Nothing critical is missing for correct invocation, though it could have named its nearest sibling.

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% for the single 'text' parameter, including the asterisk verb-marking convention and length limit. The description restates that same asterisk convention with an example but adds no new format or constraint detail, so baseline 3 applies.

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?

States a specific verb and resource — translating English text into the Shoren tongue of Veylantia — with a flavor descriptor ('clipped and consonant-struck'). It is distinguishable from most siblings, but it never mentions the closest sibling, imagine_generate_shoren_name, so an agent must infer on its own that this tool translates arbitrary prose rather than generating a name.

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?

Usage is implied by the purpose ('translate English text'), and the asterisk convention hints at how to get verb-last output. However, there is no explicit when-to-use/when-not guidance and no routing to alternatives such as the Shoren name generator, leaving selection partly to inference.

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