layer_add_alpha

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

No annotations are provided, so the description carries the full burden. 'Ensure' weakly implies idempotent conditional behavior (add alpha only if missing), but it says nothing about whether this mutates in place, what happens if alpha already exists, or whether the change is undoable.

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?

A single, front-loaded sentence with no wasted words. Its brevity is appropriate, though it borders on under-specification given the tool's mutation behavior.

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?

An output schema exists, so return values need not be explained, but for a mutating tool with zero annotation coverage and 0% parameter documentation, the description should at least address idempotency and error/side-effect behavior. It leaves significant gaps.

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% and the description adds no meaning for layer_id or session_id. The parameter names are fairly self-explanatory, but neither the schema nor the description clarifies required session context or layer scoping.

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?

States a specific verb ('ensure') and resource ('alpha channel' on a layer), so the operation is unambiguous. However, it does not distinguish itself from siblings like layer_create or layer_update, which could plausibly also affect alpha channels.

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 indication of when to use this versus alternatives such as layer_update or layer_create, no prerequisites, and no exclusions. The agent must infer the usage context entirely.

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