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

Annotations already declare readOnlyHint=true, so the safety profile is covered and the description adds the substantive part: exactly what is aggregated and returned, including that cards and lessons carry links and passages carry book/page/short excerpt. It does not address failure behavior for a missing slug, which is the main remaining gap for a lookup tool.

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 a single front-loaded sentence that leads with the resource and then lists the returned components, with no filler. The enumeration is dense but each clause maps to a distinct part of the response, so nothing is wasted; a slightly shorter formulation would read better.

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?

There is no output schema, and the description compensates by describing the returned structure component by component, which is exactly what an agent needs to decide to call it and to consume the result. Combined with 100% schema coverage and a clear read-only annotation, nothing essential is missing for a two-parameter lookup tool.

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 coverage is 100%, so the schema already documents both parameters, making 3 the baseline. The description adds real meaning beyond it by disclosing that the slug accepts an alias (e.g. 'bitul'), which the schema does not state; it is silent on the language parameter, but the schema fully enumerates its values.

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 names a specific resource (a single topic) and enumerates its result composition: name/description, Chassidut In Depth concept cards with links, closest passages in Sefer HaMaamarim with book/page/excerpt, and central lessons with links. This clearly separates it from list_topics (enumeration) and the single-item getters like get_lesson or get_in_depth.

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?

Usage is only implied: by describing an aggregate hub of cards, passages and lessons, an agent can infer this is the entry point for exploring a topic. There is no explicit when-to-use statement, no mention of when to prefer get_in_depth, get_lesson or search_lessons instead, and no guidance on what happens with an unknown slug.

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