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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered structurally. The description adds that output is line-by-line content, but says nothing about error behavior for an unknown id, pagination, or truncation for long texts.

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 lead sentence is front-loaded and tight, but the second sentence is a semicolon-run fragment mixing Talmud domains, search, original text lookup and Library books, which dilutes rather than sharpens the tool's scope.

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, fully documented read tool with annotations and no output schema, the description supplies enough to invoke it correctly. The remaining gap is the absence of any guidance on choosing it over its siblings.

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 already explains that id accepts either an id from list_readings or a plan name like 'japji'. The description adds no further syntax or resolution semantics beyond that, so the baseline 3 applies.

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 and scope: a single reading or plan, returned line by line, which separates it from the plural list_readings. The second sentence is muddier, naming adjacent concerns (search, original text lookup, whole books) that belong to sibling tools, so the boundary with get_talmud_text/search_readings is only implied.

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 statement of when to call this versus list_readings, read_book, or get_talmud_text. The clause about reading whole books 'a passage at a time' gestures at a distinction but never names the alternative tool or the condition that selects it.

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