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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, destructiveHint=false, openWorldHint=false), so the bar is lower. The description still adds meaningful context beyond them: the pronunciation-based rather than official-code semantics, and that each language entry shows conversion sources (rules, dictionary, espeak). No pagination or ordering behavior is disclosed, keeping it below a 5.

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, front-loaded with the core purpose and the important semantic caveat. The trailing Korean translation duplicates the English rather than adding information, which is a minor inefficiency but not harmful.

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 an optional-parameter, no-output-schema lookup tool, the description covers what is returned (per-language conversion sources) and the key semantic distinction from real braille codes. Combined with full schema coverage and rich annotations, only fine-grained ordering/pagination detail is missing.

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%, so both the limit cap/default and the query example (korean, ko) are already documented in the schema. The description adds no further parameter meaning, 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 pair (lists/searches) and resource (languages the WIA Braille engine can convert), and immediately disambiguates it from the conversion siblings by clarifying it is pronunciation-based, NOT an official national braille code. An agent can distinguish it from braille_convert without opening either 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?

Usage is implied rather than stated: searching for a language code or name is the obvious precursor to braille_convert, but the description never says when to call this versus braille_engine_info or the other siblings, nor any exclusions. Adequate but leaves routing to inference.

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