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

With no annotations, the description carries the full behavioral burden. It does not state that this is a read-only operation, does not describe auth requirements beyond the cryptic 'PRO.' marker, and says nothing about pagination, rate limits, or return format.

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 definition is compact and front-loaded with the core scope. The leading 'PRO.' is cryptic, but the rest of the sentence is efficient and avoids filler.

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?

Given no annotations, low schema coverage (33%), and no output schema, the description is too sparse. It covers the basic purpose and date format but omits behavioral details, return expectations, and sibling differentiation needed for confident invocation.

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 description adds useful meaning for `since` by specifying the YYYY-MM-DD format and indicates `keyword` is optional. However, it does not clarify what fields the keyword searches, whether the date is inclusive, or how `access_token` is required beyond the schema's own note.

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 identifies the resource (vehicle, tire, and child-seat recalls) and the scope (posted since a date, optional keyword). It is specific enough to distinguish from a detail tool, but it does not explain how it differs from the sibling `vehicle_recalls` or what makes it 'new'.

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 explicit guidance on when to use this tool versus `vehicle_recalls`, `recall_detail`, or `fleet_check`. The only implied usage is that it retrieves recalls since a given date, leaving the agent to infer routing decisions from names alone.

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