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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the safety bar is low. The description adds that returned text is 'verified' and 'full' (implying no truncation or partial excerpts), which is useful, but says nothing about what happens with an unknown id or how 'both' is returned.

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 short sentences with zero filler; the core capability is front-loaded and the usage hint follows. Nothing is repeated from the schema or annotations.

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 simple two-parameter read tool with annotations covering safety and no output schema, the main gaps are the undefined 'id' (its only required parameter) and any hint at how single-script versus 'both' results are shaped. Adequate but leaves the most critical input unexplained.

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 0%, so the description must carry the load. It does clarify the script enum well — 'simple Roman (English letters)' and 'both' are more informative than the raw enum values — but the required 'id' parameter is never explained (prayer identifier, format, where to obtain it).

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 and resource — retrieves the full text of exactly one prayer — plus the available script renderings. It is distinguishable from list_texts and search by the singular 'one prayer' framing, though it never explicitly contrasts itself with the ambiguous sibling 'fetch'.

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?

'Use for recitation help or when the user reads only one script' gives real usage context, but there is no statement of when not to use it, no mention of when search or list_texts should come first to obtain the id, and no exclusions.

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