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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds the useful clarification that the date refers to the catalog check date rather than creation/update time, but it does not describe result shape or how ordering ties behave, and the limit cap it states is already in the schema.

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?

Three short sentences with the ordering rule front-loaded and no filler. Slight waste in restating the 25 cap already present in the schema, which keeps it from a 5.

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, no-required-args read tool with rich annotations and no output schema, the description covers ordering semantics and the cap. Only the return shape/pagination details are absent, which is minor here.

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 coverage is 100% and the single parameter's description already says 'Values above 25 are capped at 25,' so the description's cap sentence is redundant. It adds no format or default detail beyond the schema, making baseline 3 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 and resource ('List catalog resources') plus the ordering key ('newest by lastChecked'), which lets an agent distinguish it from get_resource and search_resources. The phrasing 'newest by lastChecked' is slightly awkward but the intent is recoverable.

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?

There is no explicit when-to-use guidance and no mention of when to prefer search_resources or get_resource instead. The agent must infer that this is the unfiltered 'browse newest' path with no stated exclusions.

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