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

readOnlyHint=true already establishes this is a safe read. The description adds the 6-month window constraint, but says nothing about rate limits, pagination, or how the multiple report_types are combined in a response; with annotations covering the safety profile, this is an adequate but thin addition.

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 sentences, front-loaded with the payload content and followed by the endpoint. Every clause carries information; nothing is 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 read-only report tool with a fully documented schema and no output schema, the description covers what is retrieved and the period constraint. Return shape for the various report_types is left unspecified, but that is a minor gap given the schema's completeness.

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 baseline is 3. The description only restates the 6-month period limit that date_to's schema description already gives, adding no format or semantics beyond the schema.

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 names the concrete data returned — sales, costs, profit and order-count reports — which is more informative than a bare 'get statistics'. It clearly distinguishes this reporting tool from siblings like printful_list_orders or printful_estimate_order_costs, though it never explicitly differentiates itself from them.

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?

It states one real usage constraint (period of at most 6 months) and implies the reporting context, but gives no when-to-use versus alternatives such as printful_estimate_order_costs or printful_list_orders, and no prerequisites about account- vs store-level tokens.

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