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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, destructiveHint=false, openWorldHint), so the bar is low. The description does add one genuine behavioral trait: sequential reading, where the next passage carries into the next chapter. It says nothing about auth, rate limits, or how passage boundaries are determined.

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 first sentence merely duplicates the title, and the second is a comma-spliced list mixing corpora with features that belong to other tools. The material is not front-loaded with a purpose statement, so an agent must parse noise before learning anything useful.

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 four parameters, no output schema, and six sibling tools, the description should at minimum state what is returned and how this differs from get_reading/search_readings. Instead it spends its budget on a duplicate title and a corpus list, leaving the tool's role in the toolkit ambiguous.

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%, so book, section, n and ref are all documented by the schema itself (including the ref override and the Bekhorot Daf Yomi default). The description adds nothing about parameters, and its 'next' phrasing could even be confused with the n parameter. Baseline 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 name plus 'the whole Theogony, Iliad, Odyssey and Poetic Edda read a passage at a time' lets an agent infer this returns a passage of a text, but the description never states the verb+resource plainly. The lead sentence is a pagination hint rather than a purpose statement, and the list of features ('daily readings explained line by line, plans, search') overlaps sibling tools like search_readings and get_today, muddying rather than sharpening the purpose.

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?

'Follow next for the next passage; it carries on into the next chapter' gives some continuation guidance, but there is no statement of when to use read_book versus get_reading, list_readings, get_today or search_readings. No prerequisites or exclusions are given despite six closely related siblings.

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