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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered. The description adds the sort order (newest first) and the fields returned, which is genuine extra context, but says nothing about pagination, the 25-item cap, or locale effects on results.

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 that identifies the resource, the ordering, and the returned fields with zero filler. Nothing could be removed without losing information.

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 simple, zero-required-parameter read tool with rich annotations and a fully documented schema, the description covers purpose, ordering, and return content. The only gaps are pagination/limit-cap behavior and how locale affects output, both minor and partly inferable from the 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%: limit (1-25, default 10) and the locale enum with its default are fully documented in the schema. The description adds no additional meaning about how locale changes names/descriptions/URLs or how limit interacts with the recency ordering, so baseline 3 applies.

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 resource (AI tools) plus the defining scope ('most recently listed, newest first') and names the payload fields (listing dates, canonical URLs). An agent can distinguish it from list_tools by the recency focus, though it never names the 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?

The 'most recently listed' framing implies a discovery/browse use case, but there is no explicit when-to-use statement, no exclusion, and no pointer to list_tools or search_tools for the full-catalog or filtered cases.

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