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

Annotations already declare readOnly, idempotent, non-destructive and openWorld, so the safety profile is covered. The description adds the 'best match first' ordering, which is genuine behavioral context, but it says nothing about result format, limits, or pagination.

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 opening sentence is tight and well front-loaded, but the second sentence is a semicolon-and-colon run-on ('daily verses, plans, search and verse lookup; whole books from the Library, read a passage at a time') that is hard to parse and mixes content scope with capability.

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 tool with rich annotations, the description is minimally viable but leaves the key gap: among nine sibling tools it never clarifies selection criteria, which is exactly the context an agent needs most here.

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 and schema description coverage is 100%, so the schema already documents 'q' fully (words to search for, with examples). The description adds no query syntax or matching semantics beyond what the schema supplies, 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?

The first sentence gives a specific verb (search) and resource (curated readings) plus the ranking behavior (best match first), which distinguishes it from siblings like list_readings and get_reading. However, it never names those siblings or frames the tool against them, and the second sentence muddies rather than sharpens the purpose.

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 when-to-use guidance and no routing against the nine siblings (list_readings, get_verse, read_book, etc.). The phrase 'daily verses, plans, search and verse lookup; whole books from the Library' gestures at content scope but does not tell an agent when to pick this tool over an alternative.

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