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

Annotations already declare readOnly, idempotent and non-destructive, so the safety profile is covered. The description adds genuinely new context the annotations cannot express: this is a Preview API that may change without a version bump, a real stability caveat for an agent deciding whether to depend on it.

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 short sentences, the preview/stability warning front-loaded, then the payload contents. No filler, nothing repeated from annotations or schema.

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 single-parameter read tool with full annotations and no output schema, the description supplies what's needed: the returned fields and the API stability warning. The only missing piece is guidance on where the locationId comes from.

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?

Only one parameter exists, and schema description coverage is 0% – the locationId is documented nowhere in prose. The description says nothing about the identifier's origin or its 'loc_' prefix format, so it fails to compensate for the schema gap even though the schema does carry a pattern constraint.

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 location") and enumerates the returned fields (name, currency, time zone). It is clearly distinguishable from cliento_list_locations by singularity, though it never names that sibling explicitly.

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?

Singular vs. plural only implies the retrieve-by-id use case; the description never says when to prefer this over cliento_list_locations or how to obtain a locationId. Useful but the routing is left to inference.

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