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

Annotations already establish this as a safe, read-only, idempotent, non-destructive, closed-world operation, so the bar is lower. The description adds genuine value beyond them by disclosing the validation scope, notably the conditional 'phone or geo requirements' rule, which tells the agent what class of errors to expect.

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 front-loaded sentence with no filler; the verb and target resource come first. It is slightly repetitive ('Hotel Center Hotel List') and terse enough that it omits useful routing detail, but nothing is wasted.

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 an output schema covering return values and annotations covering the safety profile, the description only needs to convey what is validated and for which feed, which it does. The main residual gap is that it does not say whether validation stops at the first error or reports all issues, but that is likely in the output schema.

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%, with both content and the format enum fully documented in the schema itself (format values, auto-detection behavior, 2 MB limit). The description adds no parameter-level detail, so the baseline 3 for schema-driven documentation is appropriate.

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 (Validate) and a specific resource (Google Hotel Center Hotel List static feed), and enumerates what is checked (identifiers, address, country, phone/geo requirements). This distinguishes it from the generic validate_feed and validate_hotel_master_data siblings by naming the target platform, though it does not explicitly contrast itself with them.

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?

The description implies its usage context by naming the exact feed type it accepts, so an agent knows to use it for Google Hotel Center lists rather than other platforms. However, it gives no explicit when-to-use/when-not guidance and never names the generic validate_feed or detect_feed_format alternatives that a caller might otherwise pick.

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