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

Annotations already declare this is read-only, idempotent, non-destructive, and not open-world. The description adds meaningful behavior beyond that: it explains what the link is for, the user workflow, that video stays on the device, and that it works on every plan including Free.

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 purpose is front-loaded in the first sentence, and the remaining sentences add useful workflow, privacy, and plan-availability context without filler. Every part earns its place for an agent that must explain the tool to a user.

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?

There is no output schema, but the description adequately says the return includes a link and steps to give the user. It also covers privacy and plan compatibility. Minor gaps remain around link expiry or exact response shape, but the definition is otherwise complete for correct invocation.

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 enum-rich parameters are already well documented in the schema. The description only refers generally to “these caption settings” and adds no parameter-specific meaning beyond what the schema provides.

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 a specific verb and resource: it returns a Cuecaps studio link configured with caption settings, plus user steps. It is clearly distinct from list_styles, though it does not explicitly name that sibling or contrast the two.

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 clear usage context: the agent should return the link and steps so the user can open the studio, add a video, find words, and export captions. It does not state explicit when-not conditions or direct alternatives, but the intended workflow is unambiguous.

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