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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered. The description adds the status vocabulary (pending/confirmed/seated/cancelled) which is useful context, but does not discuss auth needs or error behavior for invalid refs. With annotations carrying the safety profile, a 3 is appropriate.

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?

One dense sentence, front-loads the lookup purpose and packs in the status vocabulary efficiently. Slightly terse but no 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?

For a read-only lookup with an output schema, the description covers the essential inputs and returned status values. It doesn't explain failure modes for unknown references or phone mismatches, leaving some gaps in an otherwise simple tool.

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 description must compensate. It clarifies that ref follows an RZ-XXXXX format and that phone is the guest's phone number, which is genuinely beyond the bare schema strings. However, it doesn't specify format requirements or validation for either, so it only partially fills the gap.

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 clear verb (retrieve status) and resource (booking request), scoped by reference. Distinguishes itself from siblings like request_table and cancel_booking, though it doesn't explicitly name an alternative.

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?

Usage is implied by the required ref+phone pair, implying it's a lookup tool, but there is no explicit when-to-use or when-not-to guidance relative to siblings.

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