Coverage overview

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and a closed world, so the safety profile is fully covered by structured data. The description adds content scope (what domains the overview spans) but says nothing about output size, pagination, or latency, so it adds moderate rather than rich behavioral context.

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?

A single colon-delimited sentence enumerating the covered domains, followed by the two-word directive 'Start here.' It is tightly front-loaded with no filler. The enumeration is a touch list-like, but every item conveys scope information the agent needs.

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 zero-required-parameter, read-only orientation tool, the description communicates the scope of the answer, and the two formatting parameters are fully specified in the schema. With no output schema, describing the subject matter of the response is the right substitute; only a note on response size or structure is absent.

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%: both 'lang' and 'response_format' are fully documented with enums and defaults, and the description adds nothing about them. Per the rubric, full schema coverage establishes a 3 baseline even with no parameter discussion in the description.

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 resource precisely — coverage of the six Gulf countries, the authorities and duties register, verification status — so an agent knows this is an orientation/summary tool. It does not explicitly contrast itself with siblings like najjab_list_obligations, so it falls short of a 5, but the verb-less 'what Najjab covers' framing is unambiguous about the content returned.

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?

'Start here' is an explicit, front-loaded usage directive that tells the agent to call this before the more specific siblings (list_obligations, get_obligation, deadlines, etc.). It gives no when-not or exclusion conditions, which keeps it from a 5, but the intended entry-point role is clear.

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