vast42_create_ad

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only says 'Create', which is the basic action. It does not mention side effects, return behavior, required parent entities, auth needs, or any consequences of invocation. This is no more informative than the tool name itself.

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 a single, direct sentence that is perfectly front-loaded and contains no fluff. It is concise and easy to scan, earning a high score for conciseness.

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 tool is simple (3 params, no output schema), but the description is too sparse. It does not explain what a 'VAST 4.2 ad item' is, does not differentiate this tool from the similar vast_create_ad_item or draft_create_ad_item, and does not indicate what the response contains. This leaves an agent without sufficient context to invoke it confidently.

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 100% parameter description coverage, with each parameter (name, active, location) clearly explained. The description adds no parameter-level detail, but the baseline for full schema coverage is met, so a score of 3 is appropriate.

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 precisely states the action ('Create') and the resource ('VAST 4.2 ad item'), making it clear this tool creates a specific entity. This distinguishes it from sibling tools like vast42_get_ad, vast42_update_ad, and vast42_delete_ad, which handle other CRUD operations.

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?

No guidance is provided on when to use this tool versus alternatives such as vast_create_ad_item, draft_create_ad_item, or even vast42_create_placement. The description does not mention prerequisites, ordering, or any condition that would help an agent choose this tool.

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