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

readOnlyHint=true already declares the safety profile, so the description carries a lower burden; however it adds almost nothing beyond that. The raw endpoint template (GET /locations/<LOCATION#>.api) is marginal value, and there is no mention of behavior when the id is unknown, what is returned, or any access requirements.

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?

It is short and front-loaded with the purpose, but the second sentence (the HTTP path template) earns little for an agent that never needs the raw route, while guidance that would matter is absent. Brevity here tips into under-specification.

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 one-parameter read with full schema coverage and a readOnly annotation, the basics are covered and no output schema needs explaining. Still missing is sibling routing (list vs single fetch) and failure behavior for a bad id, which an agent would want.

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 is documented in-schema, so the baseline is 3. "By id" in the description merely restates the parameter without adding format, range, or lookup semantics.

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?

"One location by id" states a specific verb (retrieve) and resource (location) plus cardinality, and the endpoint template reinforces it as a single-record fetch. It does not name any sibling, but the word "one" implicitly contrasts with list_locations.

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?

No guidance on when to call this versus list_locations or get_location_quantities, and no statement of prerequisites. The only hint is "by id", leaving the agent to infer that it needs an id already in hand.

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