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

The description explicitly states 'Metadata only: no audio file,' which is a key behavioral constraint that informs users what the tool will not return. It also specifies that only 'Published tracks' are included, and the query-mapping examples clarify how search terms are interpreted (e.g., 'dungeon' as keyword), giving insight into the tool's behavior beyond a simple list of parameters.

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 compact yet information-dense, combining a clear purpose, a behavioral note, and three illustrative query mappings in a few sentences. It avoids redundancy and stays focused on the most important aspects for a user, though the examples add a little length without detracting from clarity.

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 that there is no output schema, the description partially addresses return format by mentioning that results include composer, album, moods, keywords, duration, and page URL. It does not describe pagination or sorting behavior of results, but the presence of limit/offset parameters implies them, and the core return fields are covered sufficiently for a search tool.

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?

The schema already provides descriptions for 10 of 13 parameters (77% coverage), which meets the high-coverage baseline. The description adds useful mapping examples for genre, type, and keyword but does not elaborate on sort, limit, or offset beyond their self-explanatory names; thus it offers moderate added value but not exhaustive parameter explanation.

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 searches published tracks of MGS Audio, listing the key attributes (composer, album, moods, keywords, duration, page URL) and explicitly notes it returns metadata only. It also provides concrete examples mapping natural-language queries to specific fields (genre, type, keyword), which removes ambiguity about the tool's scope.

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 includes practical usage examples (e.g., 'a battle theme' → genre: 'Combat', type: 'music'), effectively teaching how to construct queries. While it does not explicitly contrast with sibling tools like search_encyclopedia, the focus on music tracks and metadata makes the intended use case clear, and the examples provide enough guidance for typical usage.

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