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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered and the description needn't restate it. The description adds only the "with its status" hint and the GET endpoint; it says nothing about behavior for a missing or deleted id (e.g. 404 vs empty) or whether soft-deleted requests are returned.

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 zero filler, and the core identity (single leave request by id) is front-loaded before the endpoint detail. Nothing needs trimming.

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?

With no output schema, the description carries the burden of describing the return shape, and "with its status" is a thin sketch of what is presumably a richer leave-request object (dates, type, employee, approver). For a single-param read tool this is minimally adequate but leaves the agent guessing about response fields.

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% and the single parameter (leave_request_id, positive integer) is fully documented in the schema, so baseline 3 applies. The description contributes nothing beyond the schema — no id format, source of the id, or validity constraints.

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 and resource ("One leave request by id") plus the underlying REST endpoint, so the agent immediately knows this is a single-resource retrieval. It does not name the sibling breathehr_list_leave_requests to draw the singular/plural contrast, but "by id" makes the distinction reasonably inferable.

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 only implied: the agent can infer it should be used when it already has a leave_request_id and wants one record rather than a list. There is no explicit when-to-use statement, no mention of checking against list_leave_requests first, and no mention of what to do when the id is unknown.

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