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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description goes further by disclosing input processing behavior (vowel points and cantillation stripped) and output ambiguity handling (final letters returned as both ordinary and 500-900 forms rather than a single choice), which is genuine context beyond the annotations.

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 dense, front-loaded sentences that carry the cipher list, the preprocessing rule, and the final-letter ambiguity rule with no filler. The trailing group/cost metadata is standard boilerplate.

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 values need no explanation, and annotations cover the safety profile. The main parameter's semantics are well covered; the only gap is that the optional compact-mode parameters (`fields`, `precision`) are addressed only in the schema, not the description.

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 coverage is 67%; `fields` and `precision` carry their own schema descriptions, while `text` has none. The description compensates by explaining how the Hebrew input is interpreted (stripped vowel points, final-letter handling), adding real semantic meaning to the required parameter beyond the bare string type.

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 states a precise operation (computing seven named ciphers over a Hebrew text) and enumerates the exact ciphers: absolute, large, small, ordinal, inclusive, AtBash and AlBam. This clearly distinguishes it from the Kabbalah siblings (sephiroth, shem_names) and from other esoteric tools.

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 scope makes the applicable use case inferable, but there is no explicit when-to-use statement, no prerequisites, and no named alternative or exclusion. The agent must infer applicability from the domain description alone.

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