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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds useful behavioral context — that the NWT line appears only when the verse page or a site article quotes it — which is conditional availability an agent could not infer from the schema or annotations.

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?

One dense run-on sentence with no leading verb phrase; the translation list dominates the text and buries the operative information. The list is arguably valuable content, but the structure is not front-loaded around what the tool does.

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?

An output schema exists, so enumerating return fields is redundant here — and that is most of what the description does. Meanwhile the two things an agent actually needs, the reference format and when to choose this over get_verse, are absent.

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 'reference' parameter, and the description never explains what form a reference takes (e.g., 'John 3:16') or any constraints. With low coverage the description is expected to compensate, and it does not.

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 inventories the translation sources the tool surfaces (KJV, ASV, YLT, WEB, Darby, Douay-Rheims, JPS 1917, Brenton, plus Greek/Hebrew and notes), which conveys the resource. But it never states a verb or the actual operation — it never says it compares translations for a given verse reference — so the purpose must be inferred from the name and the content list.

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?

No when-to-use guidance and no mention of alternatives such as get_verse or get_bible_passage, which are obvious siblings in the same list. The agent is left to guess whether this is the right tool for a single-verse comparison versus a broader passage fetch.

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