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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered elsewhere. The phrase 'line by line' is the only behavioral hint (a possible line-by-line return format), and no auth, rate-limit, or error context is added. The description contributes almost nothing beyond the 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?

It is short, but the first two fragments ('Bible Swipe' and 'One reading or plan, line by line') duplicate the title, and the third sentence describes the broader app rather than this tool. Sentences do not earn their place, so brevity here reflects thinness rather than discipline.

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 simple single-parameter read tool with full schema coverage and complete safety annotations, the description's remaining job is disambiguation, which it fails. An agent still cannot tell this apart from bible_get_passage or bible_get_today.

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%, and the schema itself explains the id thoroughly (reading/plan id from /readings, or a plan name like 'japji'). The description adds no parameter detail, so the baseline of 3 is appropriate.

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 mostly restates the title and adds a brand tagline ('Bible Swipe'). 'One reading or plan, line by line' only loosely hints at retrieving a single reading/plan, and it never distinguishes this tool from close siblings like bible_get_passage, bible_get_today, or bible_list_readings. An agent cannot confidently separate it from those without opening schemas.

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 prerequisites, and no named alternative. The trailing sentence 'Bible: daily readings, plans, search and passage lookup' describes the whole product surface rather than telling the agent when this specific tool applies.

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