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

With no annotations, the description carries the full burden, and it discloses almost nothing: not whether it is read-only (implied only by 'changelog'), how many entries are returned, whether results are time-ordered, or what a 'recent' window means. The single word 'Recent' is the only behavioral signal offered.

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?

One short, front-loaded sentence with no filler or redundancy. Its brevity borders on under-specification rather than waste, so it is efficient but not maximally informative.

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 zero-parameter, no-output-schema, no-annotation tool, the description is the only source of information about return content and semantics, and it supplies almost none. An agent still does not know what a changelog entry looks like or how many come back.

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?

The tool takes zero parameters and the schema is trivially complete, so there is no parameter meaning for the description to add. Baseline 4 applies; the only shortfall is that it does not say the tool is unfiltered or that recency is fixed server-side.

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?

"Recent verification changelog" names the resource (a changelog) and scopes it to ferryuk, which separates it from ferryuk_get_fact and ferryuk_list_facts. However, it is a bare noun phrase with no verb, and "verification changelog" is undefined jargon — an agent cannot tell what a changelog entry contains or what 'verification' refers to.

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 guidance on when to call this versus ferryuk_list_facts or ferryuk_get_fact, and no mention of prerequisites, ordering, or how far back 'recent' reaches. The agent must infer usage purely from the sibling naming convention.

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