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

With no annotations, the description carries the burden. It does disclose credit usage and processing location ('processes in the browser'), which is useful. However, it does not explain what happens to the input audio (e.g., whether it modifies the file, returns a new file, or is destructive), leaving behavioral aspects unclear.

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 core purpose is front-loaded in the first sentence, which is good. However, the description spends four sentences on credit and pricing details, which is excessive and could be condensed. Overall, it is wordier than necessary for a tool with no parameters.

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?

The description explains what the tool does and its credit cost, but lacks crucial operational context: how the input is selected, what happens after processing, and what the output format is. With no output schema or annotations, this incompleteness is significant. It focuses heavily on pricing at the expense of usage mechanics.

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 input schema is empty (0 params), so the baseline is 4. The description does not mention how the audio file is provided to the tool, which is a significant gap for an agent selecting and invoking it. It adds no parameter meaning beyond the schema, so a deduction to 3 is warranted.

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 function: 'Adjust bass, mid, and treble frequencies.' This gives a specific verb and resource, and the wording distinguishes it from sibling audio tools like mio_audio_compressor or mio_audio_denoise.

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 clearly implies usage for equalization tasks. It also provides applicability constraints via credit information ('Day Pass does not include this workspace'), which signals when the tool may not be available. However, it does not explicitly mention alternatives or say when not to use it, so it falls short of a 5.

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