animate_with_text_v3

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It explains the interpolation between frames, required first_frame, optional last_frame, and constraints like frame count evenness and no_background default. However, it does not describe the output format or behavior if constraints are violated.

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, highly front-loaded with purpose. Every sentence adds value: first defines the tool, second gives usage guidance and constraints. No wasted words.

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 no output schema and no annotations, the description covers purpose, key constraints, and usage distinction. Missing output description (e.g., what is returned) but otherwise complete for selecting and invoking correctly.

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 schema already documents all parameters. The description adds contextual meaning by mentioning the first/last frame and constraints, but does not add semantic detail beyond what schema descriptions already provide.

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 it performs keyframe-based animation with first and optional last frame, producing interpolated results. It distinguishes itself from the sibling animate_with_text_v2, which is for action description.

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?

Explicitly states when to use this tool ('Best for precise start/end control') and when not to ('Use animate_with_text_v2 instead if you just want to describe an action'). Also provides constraints like frame count range, max resolution, and pixel budget.

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