get_warranty_status

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds one genuinely useful behavioral note — that unknown starting dates or terms remain unknown rather than being inferred — which is more than the annotations provide, but it still says nothing about auth, rate limits, or how missing data is surfaced.

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 tight sentences with no filler, and the primary purpose is front-loaded before the caveat about unknown data.

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?

An output schema exists, so return values needn't be documented, and read-only annotations cover the safety profile. For a single-param read tool the description is nearly sufficient, with only the purchase_id semantics left unaddressed.

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 0%, so the single purchase_id parameter is undocumented in both schema and description. The description compensates only indirectly: it implies a purchase-scoped lookup but never explains the identifier's format or source, leaving a gap given the zero 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?

States a specific verb (Get) and resource (warranty provider, terms, evidence, status), which is clear and distinguishable from generic siblings like get_purchase_details by naming warranty-specific fields. It does not, however, explicitly contrast itself with the nearby get_purchase_details or get_my_purchases tools, so it stops short of full sibling differentiation.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternative tools such as get_purchase_details. The agent must infer from the name alone that this retrieves warranty data for a specific purchase.

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