Add cover art

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

Beyond the annotations (destructive, non-idempotent, open-world), the description discloses that provider scopes, locks and credits apply, that confirmation is mandatory before execution, and that only one submission is allowed. The single-submission constraint is valuable for a non-idempotent destructive tool. It stops short of stating exactly what state is modified.

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?

Very brief and front-loaded, with no wasted clauses. The repeated endpoint string is mild filler, but the confirmation and credit constraints follow immediately.

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?

For a destructive, non-idempotent, open-world tool with four params and no output schema, the description covers confirmation, credit/scope implications and submission limits. However, it never states what the cover art is applied to or what the caller should expect afterward, leaving a gap.

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?

Schema description coverage is 100%, so the schema already carries the parameter semantics (payload vs payload_file, confirm, account). The description adds no syntax or format detail beyond that, so the baseline 3 applies.

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 is essentially the endpoint string 'POST /v5/tools/add_cover_art' plus boilerplate, which restates the tool name rather than explaining what the operation does (e.g., attaching a cover image to a video). It provides no distinguishing detail versus any other provider operation.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives among the many sibling tools (e.g., upload_asset, overlay_image). The only conditional content is the confirmation requirement, which is behavioral rather than usage guidance.

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