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

There are no annotations, so the description must bear the burden. It discloses that the tool 'processes in the browser' and explains credit/access limitations (welcome credits, Day Pass exclusion). However, it fails to explain core operational behavior like what input it acts on or what output it produces, leaving significant transparency gaps.

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 front-loaded with the main purpose, then provides a clear yet somewhat lengthy explanation of credit and workspace details. Each sentence about pricing adds context for an agent considering cost/access, though it could be tightened. Overall, it is appropriately sized and structured.

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?

Despite having no parameters or output schema, the description fails to explain how the tool receives or returns audio. The heavy focus on pricing and workspaces leaves the core operational context ambiguous—what file does it compress, and what is the result? This is a significant gap, especially for a tool with no structured schema to fall back on.

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 tool has zero parameters and 100% schema coverage (vacuously). According to the rule, 0 params baseline is 4. The description adds no parameter-specific meaning because there are none to document.

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's function: 'Audio Compressor — Control dynamic range with professional compression.' This is a specific verb+resource combination that distinguishes it from other audio tools. However, it does not explicitly differentiate from siblings like noise reduction or equalization, though the name alone is fairly distinctive.

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 implies usage through 'Control dynamic range,' but provides no explicit 'when to use' or alternatives. It does add context about credit costs and workspace restrictions, such as 'uses more credits per run' and 'Day Pass does not include this workspace,' which are useful for deciding whether to invoke the tool but not for selecting it over alternatives.

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