ensure_layers_present

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

No annotations are provided, so the description carries full burden. It does not disclose critical behaviors: whether cels are created if missing, whether existing cels are overwritten, what happens if layers don't exist, or the return value. This is a significant gap.

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 concise sentence with no filler. It is front-loaded with the key action and scope. However, it sacrifices depth for brevity.

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 4 parameters, no annotations, no output schema, and zero schema descriptions, the description is woefully incomplete. It fails to explain behavior, parameter roles, or return values. A minimal viable description would need more detail.

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 0%, and the description adds no parameter detail. The tool name and description hint at what 'layer_names', 'start_frame', and 'end_frame' do, but there is no explicit explanation. For a tool with 4 parameters, this is insufficient.

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 verb 'ensure' and the resource 'cels exist for layers across a frame range'. It distinguishes from sibling tools like 'create_cel' (single cel) and 'propagate_cels' (duplication). However, it could be more precise about whether it creates cels if missing or only checks.

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 on when to use this tool versus alternatives. Among sibling tools like 'create_cel', 'copy_cel', 'propagate_cels', there is no indication of the specific use case. The description implies a batch operation but offers no context.

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