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

With no annotations, the description bears the full burden of disclosing behavior. It states that the tool returns text from the Hebrew Bible and implies a read-only lookup, but it does not explain error handling, language defaults, or what exactly is returned beyond 'text'. These gaps are meaningful for a straightforward retrieval tool.

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 description is two concise sentences with no wasted words. The first sentence front-loads the core purpose and example, and the second sentence adds a practical usage tip. Both sentences contribute directly to correct tool use.

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 single-verse lookup, the description covers the core purpose, source text, and a validation hint. It could mention the language behavior or explicitly address a full-chapter alternative, but the schema plus this brief description give an agent enough to call the tool successfully in most cases.

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?

The schema already documents all four parameters with 100% coverage, including enums for book and language. The description adds a useful example and a note to consult list_books for book names, but it does not provide additional parameter semantics beyond what the schema already offers.

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 clearly states the tool returns the text of one specific verse, with a concrete example (Genesis 1:1). It identifies the resource as the Hebrew Bible / Tanach, but it does not explicitly contrast itself with the sibling get_chapter tool, relying instead on the word 'verse' to imply the distinction.

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 description gives clear context for when to use this tool: when a single verse is needed. It also provides a helpful prerequisite by directing the agent to use list_books for valid English book names. However, it does not state when not to use it or mention alternatives such as get_chapter for whole chapters.

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