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

No annotations are provided, so the description carries the full burden. It discloses that processing happens in the browser and uses credits, which is useful. However, it does not disclose important behavioral traits such as whether files are uploaded, size limits, whether the original file is deleted, or if there are any side effects beyond credit consumption.

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 moderately concise but includes multiple pricing-related sentences that may be extraneous for tool selection. It is front-loaded with the core purpose, but the credit/workspace information, while useful, could be condensed. The length is acceptable but not as tight as it could be.

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 covers the tool's core purpose and adds important context about credit and workspace restrictions. However, with no output schema and no parameter details, the description does not fully explain what the user should expect from the conversion process (e.g., output location, any settings, or limitations). It is adequate for a simple conversion tool but leaves some gaps.

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 and schema description coverage is 100% (vacuously). Since there are no parameters to document, the description does not need to add parameter semantics. The baseline of 4 for tools with 0 params is appropriate, and the description provides context about the tool's behavior rather than parameter details.

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 verb 'Convert' and the resource 'AVI videos to MP4 format'. It distinguishes the tool from siblings by naming the specific format conversion, though it does not explicitly differentiate from all other video conversion tools (e.g., mio_video_mkv_to_mp4).

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 gives context on credit usage and workspace eligibility, implying when this tool is economically appropriate. However, it does not explicitly state when to use this tool versus alternative conversion tools, nor does it provide exclusions or alternatives beyond pricing information.

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