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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states that it lists current offers, implying a read-only operation, but does not explicitly mention side effects, pagination, or response format. For a simple listing tool this is acceptable, but it could be more explicit about safety and output.

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 a single, compact sentence that front-loads the purpose and includes relevant examples. There is no redundant or filler content; it is appropriately concise for a simple tool.

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?

The description adequately covers what the tool does for a simple listing: it specifies the platform (Compera) and provides examples of categories. With a single optional parameter fully documented in the schema, the description is sufficient for an agent to invoke the tool correctly. It could optionally mention that it returns a list of deals, but that is implied.

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?

The input schema fully documents the single optional 'limit' parameter with a description (default 8, range 1-20). The description adds no additional parameter semantics, which is fine given the schema coverage is 100%.

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 states the tool lists current offers/discounts across categories, giving examples like electricity, mobile, streaming, and insurance. It conveys a specific verb (list) and resource (current deals), and the name 'deals_now' reinforces this. However, it does not explicitly differentiate itself from sibling tools like product_offers or compare_category, so it misses an opportunity to be fully distinct.

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 guidance on when to use this tool versus alternatives. There is no mention of scenarios where one would prefer deals_now over product_offers, compare_category, or other siblings. An agent is left to infer usage from the name and description alone.

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