ensure_layers_present

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

No annotations are provided, and the description does not disclose whether the tool creates cels, overwrites existing ones, or only reports missing cels. Behavioral traits like mutation, failure conditions, or side effects are absent.

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 short sentence, which is concise, but it is vague and lacks critical details. It could be restructured to front-load the action and include parameter context.

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 the tool has 4 parameters, no output schema, and no annotations, the description is insufficient. It does not cover what the tool returns, prerequisites (e.g., layers must exist), or behavior when layers/cels already exist.

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 description does not explain any of the four parameters despite 0% schema coverage. 'layer_names', 'start_frame', 'end_frame', and 'filename' are not described, leaving the agent to infer meaning from names alone.

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 it ensures cels exist for layers across a frame range, which gives a general purpose but lacks a specific verb like 'create' or 'check'. It does not clearly distinguish from sibling tools like 'create_cel' or 'add_layer'.

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 like 'create_cel' or 'propagate_cels'. The context does not clarify if this is for batch operations or selective creation.

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