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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower; the description adds real value by disclosing the composition of the returned content (Sanskrit plus transliteration plus English), which no annotation or schema conveys. It stops short of describing pagination or size limits, but for a single-chapter fetch that is a minor omission.

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 definition is short and the relevant content is front-loaded, but the trailing sentence about daily verses, plans, search and the Library does not earn its place in this tool's description and blurs the reader's focus.

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?

With no output schema, the description usefully signals what the chapter result contains, and the safety/identity profile is covered by annotations. For a one-parameter read tool this is nearly complete, though it omits the size/format expectations of a full chapter.

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%, with 'Chapter number, 1 to 18.' fully documenting the sole required parameter. The description adds nothing beyond that baseline, so a 3 is correct.

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 first sentence states a specific resource (a whole chapter) and its payload (Sanskrit, transliteration, English), which an agent can distinguish from get_verse's single-verse scope. The second sentence, however, reads as an app-level feature list rather than a statement about this tool, diluting the purpose statement.

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 explicit when-to-use guidance and no named alternative, even though get_verse is the obvious sibling for single-verse retrieval. The fragment 'verse lookup' is ambiguous domain color rather than a routing instruction, so the agent must infer when chapter-level retrieval is appropriate.

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