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

Annotations already declare readOnlyHint=true, so safety is covered. The description adds two genuinely useful traits beyond that: 'basic liaison rules' flags a fidelity limitation in the output, and 'Free' discloses cost. It does not say what the return value looks like or how non-Hangul characters are handled.

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?

A single front-loaded sentence with the standard named first and the scope qualifier immediately after; nothing is padded. The trailing one-word 'Free.' is a fragment that reads slightly clipped, though it does carry cost information.

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 one-parameter, read-only conversion tool this is close to adequate, and annotations cover the safety profile. The notable gap is that no output schema exists and the description never states that the result is a romanized string, nor how mixed-script or punctuation input is treated.

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?

One parameter at 0% schema description coverage, so the description must carry the load. It does convey that the input should be Hangul text, which is meaningful for a romanizer, but says nothing about the single 'text' parameter's format, length, or how non-Hangul content is treated.

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 and resource ('Revised Romanization of Korean ... for arbitrary Hangul text') and names the standard used. The phrase 'arbitrary Hangul text' implicitly separates it from the sibling romanize_korean_name, though it never names that sibling explicitly.

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 only implied: 'arbitrary Hangul text' suggests general text rather than personal names, which nudges an agent toward this tool over romanize_korean_name. There is no explicit when-to-use/when-not statement or named alternative, and no guidance on mixed Hangul/Latin input.

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