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

The description adds substantial context beyond annotations: supported character set, that unsupported characters are reported rather than guessed, payment/credits behavior, free first calls, and failed-call billing. These details align with the readOnly and destructive annotations and materially help an agent understand cost and error behavior.

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 front-loaded with the core behavior and formats, then adds usage, an example, and billing context. It is somewhat denser than a minimal description, but every section is relevant to correct invocation.

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?

With annotations covering safety profile and schema covering parameters, the description fills remaining gaps: auto direction, supported characters, error behavior, examples, and payment model. No output schema is present, but the transformation result is sufficiently implied.

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%, so the schema already documents both parameters. The description still adds useful semantics: mode auto-detection/default behavior, Morse formatting with spaces and '/', supported characters, and a concrete example.

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 specific bidirectional transformation: text to international Morse and Morse back to text. It also clarifies automatic direction detection versus explicit mode selection, which distinguishes it from sibling text tools such as text_caesar.

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?

It gives concrete usage contexts such as puzzles, radio practice, and fun messages, and explains that direction is auto-detected or set with mode. It does not explicitly name alternatives or when not to use this tool, but the context is clear.

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