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

With no annotations at all, the description carries the full burden of behavioral disclosure and does very little. It does not define the recency window behind "recent", whether results are capped or paginated, whether entries are ordered, or what an entry contains — all things an agent needs before deciding to rely on this output.

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 short phrase with no filler, and the resource is front-loaded. It is efficient rather than padded, though it is arguably too terse to earn full marks on structure since there is no second clause explaining the payload.

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, output-schemaless read tool the description is minimally adequate: an agent knows it fetches a recent change list. The key omissions are the recency definition and result shape, which matter because there is no output schema to fall back on.

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, so there is nothing for the description to disambiguate at the argument level. The baseline of 4 applies; the description does not need to explain any inputs.

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" identifies the resource as a changelog and scopes it to recent entries, which does distinguish it from the goodsuk_get_fact / goodsuk_list_facts siblings. However, "verification changelog" is vague about what is actually being verified (rule content? source snapshots?) and the tool name itself already conveys 'changes', so the description adds only marginal specificity.

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 statement of when to call this versus goodsuk_list_facts or goodsuk_get_fact. An agent must infer that this is for detecting what recently changed rather than for retrieving current fact content; no exclusions, prerequisites, or call order are given.

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