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

Annotations already carry readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered; the description adds real value by disclosing the response shape and the domain state vocabulary (distributed, started, completed, recipients notified). It omits auth requirements, error behavior, and pagination/absence handling, so not a 5.

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 sentences, no filler, with the return contents front-loaded before the endpoint reference. Every clause earns its place.

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?

There is no output schema, so the description must sketch the return value, and it names four of the most relevant fields including the state enum. It is still not a complete picture of the returned route object (no id, dates, or nested driver/stop detail), leaving a small gap for a read 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 100% and the single route_id parameter already documents the accepted forms ('abc' or 'routes/abc'). The description's 'GET /routes/{routeId}' path template echoes but does not extend that meaning, so the schema carries the load.

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+resource ('One route') and enumerates exactly what comes back: title, driver, stop count, and state with its enumerated values. The singular 'One route' distinguishes it from the sibling spoke_list_routes without needing to name it.

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 'One route' plus the 'GET /routes/{routeId}' endpoint template, which signals single-resource retrieval rather than listing. However, there is no explicit when-to-use-vs-spoke_list_routes guidance or any precondition stated.

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