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

With no annotations, the description must carry the full burden of behavioral disclosure. It states that the tool returns certain components, implying a read-only operation, but does not explicitly confirm side-effect-free behavior or any limitations. The lack of annotation coverage means the description provides only partial transparency.

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, each with a clear role: the first states when to use, the second lists the return value. Information is front-loaded and there is no filler. It is concise and well-structured.

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?

Since there is no output schema, the description must explain what the tool returns, which it does by enumerating the returned components. However, it does not describe the structure or format of these components, which might be needed for parsing. Given the tool's simplicity (no params), this is nearly complete, but a bit more detail on return format would improve completeness.

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 tool has zero parameters, and the schema covers 100% (no params), so the baseline is 4. The description adds no parameter-specific information because none exists, but it doesn't need to. It correctly implies the tool takes no input, so the score aligns with the baseline.

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 tool's purpose: joining several fetched layouts into one deck file. It also lists the return payload (base CSS, assembly rules, spacing tokens, viewport snippet), making the function unambiguous. It distinguishes itself from siblings like get_layout (single layout) and list_layouts (listing) by focusing on bundling.

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?

Provides concrete usage triggers with example phrasings ('merge these into one file', 'bundle it as a deck', 'make it one HTML'). It clearly indicates when to call the tool, but does not explicitly mention alternatives or when not to use it, leaving some room for inference.

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