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

Annotations already cover the safety profile (readOnly, non-destructive), and the description adds substantial behavior: per-verse fallback to KJV with a `note: "fallback: english"` field, the instruction to translate as you cite, licence-based refusals, and default-edition rules. What it does not state is the actual return shape (field names beyond `note`) or whether a missing reference errors versus returning empty.

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 core action and scope, then layered with the fallback rule and numbering caveat in a logical order. It is dense but nearly every sentence carries operational information; the closing note on Ukrainian/Douay-Rheims/Geneva/Swedish/Serbian versification is genuinely useful but reads long for a caveat that applies rarely.

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?

There is no output schema, so the description carries the return-value burden and partly discharges it (text plus an optional `note` fallback marker). For a tool with five parameters and edition/licence/versification edge cases, it still leaves open what happens on an out-of-range verse or an unsupported lang code, and never names the returned text fields.

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 coverage is only 40%, with book, chapter and verse entirely undocumented in the schema, and the description compensates well: it establishes that book/chapter/verse are always KJV numbering in every edition, that end_verse produces an inclusive [verse..end_verse] range capped at 10, and how lang defaults and overrides. It stops short of giving accepted book formats (name vs. abbreviation vs. number), which is the main remaining ambiguity for a required parameter.

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 ('Fetch the raw verse text') and bounds scope immediately ('single verse or a small range (max 10 verses)'). The word 'raw' plus the naming of editions distinguishes it from sibling tools like get_commentary_section, compare_versions, and get_strongs_for_verse, so an agent can pick it without opening a schema.

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?

Gives conditional usage for the lang parameter (default conversation language, override for english/other, KJV default outside trulyrandomverse.com/ai) and notes licence refusals. It never routes to alternatives — nothing says to use compare_versions for edition comparison or get_strongs_for_verse for word-level detail — so the agent must infer sibling boundaries.

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