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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds useful return-shape context (timestamps, MP3 link, a link starting at a given ayah) but says nothing about what happens when a surah or reciter has no recording, response format, or size of the timings payload.

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?

A single sentence with no filler, and the concrete return contents are front-loaded. It reads as a dense fragment rather than a well-structured statement of purpose, which slightly reduces scannability.

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?

Because there is no output schema, the description justifiably spends its words on return values, and it does cover the core payload (MP3 link, length, per-ayah start/end seconds, ayah-anchored link). It remains incomplete for an agent deciding how to call it: no mention of the reciter id sourced from list_reciters, no fallback behavior for missing recitations, and no note on output format.

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 the baseline is 3. The description's phrasing about 'a link that starts at a given ayah, or plays a run of ayahs and stops' loosely reinforces the ayah/to interaction, but the schema already documents both fields and the reciter default, so the description adds no new parameter meaning.

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 is a noun-phrase fragment that describes the returned resource (MP3 link, duration, per-ayah offsets) rather than stating an action, but combined with the name 'get_recitation' an agent can infer it retrieves a surah-level recitation. It never explicitly names the operation or the selection inputs (surah, reciter), and gives no explicit differentiation from siblings such as get_ayah or word_by_word.

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 guidance on when to call this versus alternatives. With siblings like get_ayah (text), list_reciters (reciter ids) and word_by_word, the description never says to use list_reciters first to obtain a reciter id, nor when a surah-level recitation is preferable to per-ayah retrieval.

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