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

Annotations already cover read-only and non-destructive safety, so the bar is lower; the description adds real value by disclosing what the response contains — history, ETA, notes, and the endpoint route. The 'once live' qualifier usefully warns that the route field is conditional on request state, a behavior not visible in any structured field.

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 dense sentence fragment with no wasted words, front-loading the cardinality and resource. It loses a point only because omitting the verb makes it slightly less scannable than an explicit 'Fetches a single API request...'.

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 present, the description carries the burden of describing return values, and it does so by enumerating history, ETA, notes, and conditional endpoint route. For a one-parameter read tool whose annotations cover safety, nothing an agent needs in order to call it correctly is missing.

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?

There is one required parameter with 100% schema description coverage, and the schema already explains the id comes from list_api_requests. The description adds no further meaning about format, validity, or behavior for a missing/unknown id, so baseline 3 applies.

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 identifies the resource precisely: a single API request, plus the payload contents (history, ETA, notes, endpoint route). The word 'One' implicitly contrasts with the sibling list_api_requests, but the verb is elided — it is a noun phrase rather than an explicit 'retrieve' — so differentiation is inferred rather than stated.

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 when-to-use or when-not guidance in the description. Routing comes indirectly: the schema states the id is 'from list_api_requests', which implies list-then-get, but the description itself does not name the alternative tool or the condition that selects it.

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