Build video ad brief

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

With no annotations, the description carries full burden and discloses a key behavioral trait: local-only and no AdsTurbo API calls. However, it does not describe error scenarios, permissions, or output structure, leaving some gaps for a creation tool.

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?

Two sentences with zero fluff. The first sentence states the purpose concisely, and the second adds a critical constraint (no API calls). Every word earns its place.

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 10 parameters and no output schema or annotations, the description is adequate but lacks detail on what the generated brief contains or its structure. It could better define 'complete' and describe the output to fully inform the agent.

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 documents all 10 parameters. The tool description adds only that the tool works 'from product details', which is minimal additional meaning. Baseline 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 clearly states the tool creates a complete local-only video ad brief from product details, using a specific verb and resource. It distinguishes from siblings by highlighting that no AdsTurbo API calls are made, setting it apart as a local-only brief creator.

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 the tool is for local-only ad brief creation when no API calls are desired, but it does not explicitly state when to use this tool versus siblings like build_variation_plan or write_ugc_script. The guidance is implicit rather than explicit.

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