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

With no annotations, the description carries the burden of disclosing behavior. It mentions browser processing and credit usage, but omits what the normalization entails (e.g., whether it overwrites the original, output format, or if any file selection is required). The billing constraints are useful but don't cover core behavioral traits.

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 first sentence is concise and front-loaded with the purpose. However, the subsequent sentences are dominated by billing/workspace information that is only tangentially related to the tool's function, making the description longer than necessary for a simple normalization tool.

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 tool is simple (no parameters, no output schema), so the description doesn't need to explain return values. It provides the core purpose and some context about credit constraints, which is helpful. However, it doesn't mention any prerequisites like file type or selected media, leaving minor gaps in completeness.

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 has zero parameters, so the baseline is 4. The description adds no parameter-specific details, which is acceptable since there are none to describe. It doesn't mislead or leave undocumented parameters.

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 normalizes audio volume to standard levels, which is a specific action and resource. It doesn't explicitly differentiate from sibling tools like mio_audio_denoise or mio_audio_compressor, but the verb 'normalize' is distinct enough to infer purpose.

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 provides no explicit guidance on when to use this tool versus alternatives. It focuses on credit/workspace billing details rather than practical usage context, leaving the agent without direction on selecting this tool for a user's audio normalization need.

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