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

No annotations are provided, so the description must carry behavioral context, but it only restates the extraction purpose and examples. It does not disclose permissions, processing behavior, whether the source is preserved, expected latency, or output/return characteristics.

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?

It is a single front-loaded sentence with no filler, so it is concise. The Quick Splitter label is mild branding rather than essential information, which keeps it from 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?

For a 4-parameter audio-extraction tool with no annotations, no output schema, and no schema descriptions, the definition is far too sparse. An agent lacks enough information to select it confidently or understand required inputs like source_key and kwargs.

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 0%, and the description mentions only instrument examples (guitar, piano). It leaves source_key, kwargs, and format unexplained, including the meaning of the required opaque kwargs parameter.

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 names a specific action (isolate) and target (a single instrument) with concrete examples (guitar, piano), so the agent can understand the operation without opening the schema. It does not explicitly distinguish this from sibling tools like split_4stems or extract_vocals, which keeps it below 5.

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?

There is no explicit when-to-use or when-not-to-use guidance, and no sibling alternative is named. The phrase Quick Splitter does not tell an agent whether to choose this over split_4stems or split_6stems for multi-stem separation.

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