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

With no annotations and no output schema, the description carries the full behavioral burden and supplies almost none of it. 'Recent' is undefined (how many entries, what time window), nothing is said about ordering, pagination, or the shape of a changelog entry. Only the read-only nature is implicitly conveyed by 'changelog'.

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 sentence with the key qualifier ('recent verification') front-loaded and no filler. It is terse to the point of under-specification, but nothing is wasted or buried.

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?

With no annotations, no output schema, and no parameters, the description is the only source of information about this tool, and it explains neither the return contents nor the time window. For a changelog tool an agent cannot know what it will get back or how to interpret 'recent', which is a meaningful gap.

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 and the baseline of 4 applies. The description does not misleadingly imply any filtering options.

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 phrase 'Recent verification changelog' does add meaning beyond the name 'changes' by indicating the tool returns a log of verification events rather than the facts themselves. However, it never explains what a 'verification change' is, and it does nothing to distinguish this tool from the ~25 identical sibling `*_changes` tools other than by domain name, which the tool name already supplies.

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 when-to-use guidance at all. It does not say whether to call this before or instead of `bereavementuk_list_facts` / `bereavementuk_get_fact`, nor what question this changelog answers (e.g., freshness checks, detecting updated guidance). The agent must infer usage from the name alone.

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