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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=true, covering the safety profile. The description only adds that the underlying translation is the World English Bible; it says nothing about return format, handling of invalid references, or output size. With annotations carrying the behavioral burden, a 3 is appropriate.

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?

Two short sentences with the passage-scope information front-loaded. The leading brand fragment 'Bible Swipe.' carries no operational meaning and is slightly wasteful, but overall the description is tight and adequately sized.

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 single-parameter read-only retrieval tool with no output schema, the description is largely complete: it identifies the source text and the accepted reference formats. It could note error behavior for malformed references or what a returned passage looks like, but the essential information an agent needs to invoke it correctly is present.

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 100% and the schema gives a simple example ('John 3:16'), so the baseline is 3. The description goes further by enumerating the supported reference forms (verse, range, chapter, cross-chapter) and giving the explicit cross-chapter syntax 'Genesis 1:1-2:3', which materially clarifies how to format the single `ref` 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?

The description clearly states the resource (a passage of the World English Bible) and the granularities supported: any verse, range, chapter, or cross-chapter range. The verb is implicit ('get') but the intent is unambiguous. It does not differentiate from siblings like bible_get_reading or bible_search_readings, so it falls short of a 5.

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 when-to-use guidance, no exclusion criteria, and no mention of alternatives such as bible_get_reading, bible_search_readings, or bible_get_card. The agent must infer usage entirely from the name and sibling list.

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