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

The annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so safety is covered. The description adds one useful piece of behavior beyond the schema: the 2-credit cost of invoking it. It says nothing further about generation behavior or limits, which is acceptable given the output schema exists.

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?

It is short and front-loaded, but the phrase 'Acrostic Puzzle Generator' is repeated three times across name, title and opening of the description, and the parenthetical cost is tacked on rather than integrated.

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 low-complexity, read-only generator with a fully documented three-parameter schema and an output schema, the description supplies what is needed to select and call it correctly. The remaining gap is the absence of routing guidance among similar puzzle generators.

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 100%, with each parameter (word length range, image toggle, theme options) documented in the schema itself. The description adds no parameter-level meaning, so the baseline 3 applies.

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?

A specific verb-plus-resource statement that also explains the mechanism (first letters of answer words spell a hidden keyword), which separates it from siblings such as AnagramPuzzleGenerator or WordSearchGenerator. It stops short of naming a sibling explicitly, so it is clear but not fully differentiating.

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 choose this over the many other puzzle generators in the sibling list, nor any prerequisites or exclusions. The only contextual note is the credit cost.

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