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

With no annotations, the description carries the full burden and discloses very little: 'recent' hints at a recency window without defining it, and nothing is said about ordering, volume, truncation, or what a change entry contains. No output schema exists, so return shape is completely undocumented.

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 no redundancy. It is efficient, though the brevity is partly a symptom of under-specification rather than disciplined editing.

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 tool, the description is the only source of information about what comes back, and it supplies almost none: no entry fields, no time horizon for 'recent', no ordering. An agent can call it but cannot predict or use the result confidently.

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 clarify beyond what the empty schema already states. Baseline 4 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?

The description identifies the resource as a 'recent verification changelog' scoped to the credituk domain, which tells an agent it returns a list of change entries. However, 'verification changelog' is vague about what is actually being verified (facts? sources?) and the only real differentiation from siblings is the domain token 'credituk', which the name already conveys.

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 credituk_list_facts or credituk_get_fact, nor any stated prerequisite or ordering. The agent must infer from the sibling naming pattern that '_changes' means a changelog, which is implied usage at best.

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