ensure_layers_present

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

With no annotations present, the description carries the full burden of behavioral disclosure, but it only says cels will 'exist' without explaining whether it creates, overwrites, or preserves cels. It also fails to mention idempotency, side effects on existing cel contents, or failure behavior when a layer is missing.

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 sentence with no filler or repetition, and the core operation is front-loaded. It is concise, though the brevity comes at the cost of behavioral and parameter detail.

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?

There is no output schema and no annotation coverage, yet the description omits return behavior, idempotency guarantees, and edge-case semantics like invalid layer names or frame ranges. An agent cannot reliably predict what this tool returns or how it behaves in non-happy paths.

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 0%, so the description must compensate, but it only conceptually references 'named layers' and 'frame range' without naming or explaining filename, start_frame, or end_frame. It provides minimal orientation but not enough to understand parameter relationships or defaults.

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 uses a specific verb ('Ensure') with a clear resource ('cels') and scope ('for named layers across a frame range'), so an agent can infer the operation. It does not explicitly differentiate itself from sibling tools like create_cel, which weakens but does not destroy clarity.

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 gives no guidance on when to prefer this tool over alternatives such as create_cel, add_layer, or propagate_cels. There is no mention of situations where existing cels must be preserved, overwritten, or skipped, so usage context is essentially absent.

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