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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful behavioral context by disclosing a cost of 2 credits and the content domains used to generate puzzles, but it does not discuss rate limits or other operational constraints.

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?

The description is short and front-loaded with the core purpose, and the cost note is useful. However, it redundantly repeats 'Fill in the Blanks Generator' in the opening, wasting space without adding information.

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?

This is a simple generator with an output schema and annotations, and the description covers what it generates, its content sources, and its cost. It remains incomplete for tool selection because it lacks guidance on sibling alternatives and does not clarify how parameters like difficulty or image affect output.

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%, so the input schema already documents all four parameters. The description adds some meaning by listing category values such as idioms and science facts, but it does not explain the roles of count, image, or difficulty beyond what the schema provides, so the baseline of 3 is appropriate.

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 uses a specific verb ('creates') and resource ('completion puzzles') and names source categories including idioms, proverbs, quotes, science facts, and geography trivia. It is clear what the tool does, but it does not explicitly distinguish itself from sibling puzzle generators such as CrosswordGenerator or MadLibsGenerator.

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 provides no explicit guidance on when to use this tool versus alternatives, nor does it state when not to use it. The category examples imply its scope, but the agent must infer selection criteria from the tool name alone.

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