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

With no annotations, the description carries the full behavioral burden and largely fails it. It does not say whether existing_design is modified in place or a new design is returned, what permissions/api_key are needed, how run count is determined, or what the resulting augmented design contains.

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 sentence with no filler, and the core action is front-loaded. It is efficient, though its brevity edges toward under-specification rather than ideal conciseness.

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?

Even though an output schema exists and return values need not be explained, this is a 6-parameter, required-input mutation-like design operation with no annotations and no schema descriptions. The description is not complete enough for an agent to invoke it confidently.

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 there are 6 parameters, so the description must compensate but mostly does not. It gestures at augmentation type via 'axial, fold-over, BBD' (likely mapping to target_type) but says nothing about existing_design, selected_factors, n_center_points, reuse_center_points, or api_key.

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 a specific verb ('Augment') and resource ('screening design') and narrows the scope to 'RSM runs (axial, fold-over, BBD).' This lets an agent distinguish it from design-creation siblings like covadoe_create_design or analysis siblings like covadoe_fit_rsm, though it never names those alternatives.

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 sentence implies the tool is used to add RSM runs to an existing screening design, but it gives no explicit when-to-use condition, no prerequisite for the required existing_design, and no comparison against alternatives such as covadoe_create_design or covadoe_suggest_design.

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