build_brand_spot_from_mogrt_and_assets

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

With no annotations provided, the description carries the full burden. It discloses high-level behavior: building from real assets, optional MOGRT overlay, clipPlan-driven assembly, and optional default polish. However, it omits side effects, whether a new sequence is created or an existing one is modified, and any prerequisites such as project context.

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 two sentences with no filler, and the core action is front-loaded. It is appropriately concise, especially given that the input schema already carries detailed parameter documentation.

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 12-parameter build operation with no annotations and no output schema, the description is minimally viable but not complete. It does not explicitly say whether the tool creates a new sequence, whether it is destructive, or when to prefer it over similar siblings such as assemble_product_spot. The schema fills in parameter details, so operational context remains somewhat inferred.

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 coverage is 100%, so the baseline is 3. The description adds meaningful context by framing clipPlan as explicit creative control and explaining that the optional default polish exists so creative direction can come from LLM planning rather than hardcoded passes. This goes beyond the raw schema descriptions.

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 clear action ('Builds a branded ad assembly') and identifies the key capabilities: real media assets, optional MOGRT overlay, clipPlan control, and optional polish. It does not explicitly differentiate from sibling tools like assemble_product_spot or build_motion_graphics_demo, so it falls short of a 5.

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 when to use the tool by emphasizing LLM-driven creative direction and explicit clipPlan control, but it never names alternatives or states when not to use it. The guidance is suggestive rather than explicit, leaving the agent to infer tool selection.

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