silhouette_grid_duplicates

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

Annotations already declare the write/safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=false), so the bar is lower. The description adds genuinely non-obvious semantics: the original shape stays at cell (0, 0) and exactly cols*rows-1 copies are created, which prevents an off-by-one misread of the total count. It stops short of saying the design is mutated in place or what the call returns (no output schema).

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 tight sentences with the primary behavior front-loaded and the cell/copy-count detail immediately after. Nothing is redundant or padded.

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?

For a six-parameter mutation tool with zero schema descriptions and no output schema, the description leaves too much open: spacing behavior, what 'design' identifies, error cases, and return shape are all unaddressed. The layout semantics it does provide are good but not sufficient for confident invocation.

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 carry parameter meaning. It clarifies cols and rows via the cols*rows formula, but says nothing about design, shape_id, or spacing_x_mm/spacing_y_mm (both defaulting to 5 with unexplained units and application rules). Half the parameters remain opaque.

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 gives a specific verb ('Arrange copies') and resource ('an existing shape') plus the exact result geometry (2D cols x rows matrix), which is far more informative than the tool name alone. It does not explicitly distinguish itself from the sibling silhouette_duplicate_shape or silhouette_nest_shapes, so an agent must infer that this is the grid-specific variant.

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?

There is no when-to-use or when-not-to-use guidance; the description only states what the tool does mechanically. An agent choosing between this, silhouette_duplicate_shape (single copy) and silhouette_nest_shapes (packing) gets no routing hint.

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