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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false, and destructiveHint=false. The description adds no further behavioral context—no authentication needs, rate limits, error conditions, or detail about the return format beyond the title's 'line by line' phrase.

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?

The description is short but not front-loaded with useful information. The first sentence 'Bible Swipe.' is redundant, the second repeats the title, and the third is generic filler about Bible features that do not apply to this specific tool.

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 read-only tool with full schema coverage and annotations covering safety, the description minimally conveys that it returns today's reading line by line. However, it fails to clarify how this differs from sibling 'get_reading' tools or what a 'reading' actually contains, leaving a small but real ambiguity.

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?

The single optional 'date' parameter has full schema description coverage ('Optional day as YYYY-MM-DD. Defaults to today (UTC).'), so the schema carries the semantics. The description does not mention the parameter at all, which is acceptable given the high coverage but adds no value.

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 begins by restating the title verbatim ('Today's reading, line by line (same as the app shows today)') and adds only a generic service blurb about Bible content. It does not distinguish this tool from bible_get_reading, bible_get_card, or bible_list_readings, leaving the agent to guess which one returns the daily reading versus a specific passage.

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 is given, and no alternative tools are mentioned. The agent gets no signal for choosing between bible_get_today, bible_get_reading, or bible_get_card, all of which likely fetch reading content.

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