speech_to_speech

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

The description states 'Saves output file' indicating a write operation, but annotations include readOnlyHint: true, which suggests no side effects. This is a direct contradiction, meriting a score of 1.

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 concise with front-loaded purpose, but could benefit from structured parameter descriptions. The cost warning adds useful context without being verbose.

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?

Given the tool has an output schema, the description does not need to explain return values. It covers basic functionality and output directory, but lacks details on output format or error handling. Adequate but could be more complete.

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 0%, but the description adds meaning by specifying that input_file_path should be audio files and that output_directory has a default of $HOME/Desktop. However, it does not fully explain all parameters (e.g., voice_name).

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 states the tool transforms audio from one voice to another using provided audio files, which is a specific verb and resource. It implicitly distinguishes from siblings like text_to_speech or voice_clone by focusing on voice transformation.

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 description warns about costs and says to use only when explicitly requested, but does not explicitly state when not to use or mention alternative tools. Usage guidance is implied but incomplete.

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