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

The annotation readOnlyHint=true already indicates a safe read operation. The description adds valuable behavioral context by mentioning 'free, AI-generated, rate-limited', which warns about rate limits and the nature of output. This goes beyond the annotation without contradicting it.

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 one concise sentence, front-loaded with the core action. However, it redundantly restates the tool title at the beginning, which is slightly wasteful but acceptable.

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 simple two-parameter tool with no output schema, the description covers the core purpose and adds caveats about cost and rate limits. Still, it omits any guidance on expected output length or tone, which would be helpful for a generator tool.

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?

With 50% schema description coverage, the description should compensate for missing parameter details, but it does not mention any parameters. The 'features' parameter is documented in the schema, but 'product' lacks description and the tool description adds no clarification. This is below the baseline for tools with partial schema coverage.

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 uses a specific verb ('Write') and resource ('product descriptions'), making the tool's purpose immediately understandable. It also distinguishes itself from sibling generators like ad-copy-generator or meta-description-generator by focusing on product descriptions.

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 implies usage through its naming and purpose but does not explicitly state when to use this tool versus alternatives. No exclusions or alternative recommendations are provided, leaving the agent to infer based on the tool name.

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