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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety and scope profile is covered. The description adds that results are a limited preview ('a few of each') with links, which usefully signals non-exhaustive output and a chaining path, but it says nothing about result limits, ordering/relevance, or whether queries must be exact Arabic phrases.

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?

Two tight sentences with zero filler; the resource and scope come first and the return behavior follows. Every clause earns its place.

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, no-output-schema search tool with read-only annotations, the description covers what is searched and roughly what comes back. Minor gaps remain around result limits and how to follow a link or escalate to the get_* tools, but nothing essential to invoking it is missing.

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?

Only one parameter with 100% schema description coverage, including an Arabic example phrase, so the schema does the heavy lifting. The description restates that the query is Arabic words without adding matching behavior (exact phrase vs token match, diacritics handling), so the baseline of 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?

States a specific verb (search) and resource (Bayan encyclopedia) and enumerates the content types covered: verses, hadiths from named collections, and articles. This is clear enough that an agent can distinguish it from the singular retrieval siblings (get_verse, get_hadith, get_article) by the plural 'returns a few of each', though the differentiation is implicit rather than stated.

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 implied rather than stated: 'returns a few of each with links' suggests a discovery step followed by fetching individual items via get_verse/get_hadith/get_article, and list_articles is never mentioned. There is no explicit when-to-use/when-not-to-use guidance or precondition for choosing this over the siblings.

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