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

Annotations already declare read-only, idempotent, open-world and non-destructive, so the safety profile is covered. The description adds real behavioral context beyond that: content is fetched live from the house's own page at call time, Scripture is re-read from stored King James text, nothing is generated, and it is 'honest when no page matches' (graceful failure).

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?

Purpose is front-loaded in the first clause and the middle sentence carries the highest-value operational facts (source, non-generation, no-match behavior). The 17-name parenthetical is longer than needed and the closing theological aside about God changing names is decorative rather than decision-relevant, costing a point.

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?

An output schema exists so return format need not be described, yet the description still characterizes what comes back (meaning, origin, Bible story, verse). For a single-parameter read-only lookup it gives an agent everything needed to call it correctly.

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% and the single 'name' parameter already carries its own examples ('Elijah', 'Hannah', 'Caleb') that the description merely repeats. The description adds no format or constraint detail beyond the schema, so the baseline 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+resource (the meaning, origin and Bible story of a biblical name) and scopes it precisely ('about two hundred held'), with concrete examples. An agent can distinguish it from siblings like what_the_bible_says_about or verses_for without opening any schema.

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?

The embedded user phrasings ('what does the name Elijah mean', 'is Caleb a biblical name') give clear context for when to invoke it. However, no alternative sibling is named and no explicit when-not condition is stated, so it stops short of full routing guidance.

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