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

The annotations already establish read-only and closed-world behavior. The description adds useful scope details, including roughly 175 historical rows, no new clips, and about 200 bytes per row, but it does not cover pagination, ordering, or failure 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 short and front-loaded, with no wasted filler. The mp3:<source>@<a>-<b> notation is terse and somewhat cryptic, which slightly reduces 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?

For a tool with six parameters, low schema description coverage, and no output schema, the description leaves too much unexplained. It provides useful data-scope and size hints, but not enough detail for reliable invocation.

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 only 17%, and the description does not explain most parameters such as limit, entity, format, symbol, or appearance. It gives some meaning around word and row size, but it does not compensate for the low schema coverage.

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 identifies a specific resource: timed audio clips of a word. It also gives an output pattern and scope, but it does not explicitly contrast with sibling tools or state the retrieval action in a verb-first way.

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 says the data covers historical past calls and that no new clips are added, which is a useful limitation. It does not explain when to choose this over siblings such as word, quotes, or receipts.

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