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

There are no annotations, so the description is the only disclosure. It does not mention side effects, permissions, return format, or whether the operation is stateless. 'Runs on smart-tools.xyz' adds no behavioral context. For a conversion tool, this is a safe read-only operation, but the description leaves this to inference.

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 a single sentence with a short suffix. It is concise and front-loaded with the core action. However, 'Runs on smart-tools.xyz' is an unnecessary appendage that doesn't earn its place for tool selection, preventing a perfect score.

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?

The tool is simple with only three parameters, and the description covers all supported conversion targets, making the output type obvious (the converted string). Yet it does not explicitly state the return format or clarify the locale parameter, and there is no output schema to fill that gap. The odd locale description in the schema further reduces completeness.

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 100% with descriptions for all parameters, establishing a baseline of 3. The description adds value by listing the exact case formats in a more human-readable form (e.g., 'camelCase' vs. 'camel'), which aids correct parameter selection. However, the 'locale' parameter is omitted entirely, and its schema description ('Language for the source_url link') is confusing, so the description doesn't fully compensate.

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 specifies the tool's function: converting text to nine different casing styles. The verb 'convert' and the resource 'text' are explicit, and the enumerated list of cases (UPPER, lower, camelCase, etc.) distinguishes it from sibling tools like text_counter or slug_generator.

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 purpose implies when to use the tool (whenever text case transformation is needed), but no explicit when-to-use or alternatives are provided. The description lists supported cases but doesn't contrast with other converters or explain exclusions, so guidance remains implied rather than explicit.

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