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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description earns credit for disclosing something structured fields do not: this is a Preview API whose surface may change without a version bump, which is a real risk signal for an agent.

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 clauses with zero waste: the resource and returned fields come first, and the volatility warning is compactly appended. Nothing is redundant or buried.

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 return-value burden and does so at a high level by enumerating key fields. It does not say whether the result is a flat list or paginated, nor how many locations to expect, leaving a small gap for a zero-parameter list 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?

There are zero parameters, so the baseline is 4. The description adds value by naming the fields an agent can expect (name, currency, time zone) rather than merely repeating a schema.

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 the resource (locations accessible to this API key) and the fields returned (name, currency, time zone), which clearly separates it from the singular sibling cliento_get_location. It stops short of naming the sibling or saying 'list' explicitly, so it is clear but not maximally differentiated.

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 plural resource plus the 'accessible to this API key' scope suggests a discovery call before calling cliento_get_location. There is no explicit when-to-use guidance or exclusion, and the 17 siblings are not referenced.

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