add_basic_transitions

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

No annotations are provided, so the description must carry the behavioral transparency burden. It discloses that the tool adds a fade and returns a status message, which is helpful. However, it does not mention potential limitations, such as codec support, file size constraints, or whether the input file is modified despite the presence of an output path.

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 concise and well-structured: a one-sentence summary followed by Args and Returns sections. Every sentence adds value, and the most important information is front-loaded. No redundant or vague phrasing.

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?

Given the tool's simplicity and the existence of an output schema, the description is nearly complete. It covers the purpose, all parameters, and return value. The only gap is the lack of explicit usage guidance and edge-case behavior, but this does not prevent an agent from selecting and invoking the tool correctly.

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 schema provides only parameter types and titles with 0% description coverage. The description's Args section fully compensates by explaining each parameter: video_path, output_video_path, transition_type (with explicit options 'fade_in' and 'fade_out'), and duration_seconds. This adds meaning beyond the schema, making it clear what values to provide.

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 states 'Adds basic fade transitions to the beginning or end of a video.' This uses a specific verb ('adds') and resource ('basic fade transitions'), clearly distinguishing it from sibling tools like trim_video or convert_video_format. No ambiguity exists about what the tool does.

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 by explaining the tool's function, but it does not explicitly state when to use it versus alternatives, nor does it mention exclusions or when not to use it. There is no reference to other transition types or sibling tools in the description.

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