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

No annotations exist, so the description must fully disclose behavior. It only cryptically describes the changelog's nature (append-only, hash-chained) but does not explain what the tool actually does (e.g., returns data, triggers a recompute) or side effects like performance or access needs.

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?

The description is too terse and cryptic, sacrificing clarity for brevity. While short, it fails to convey a clear functional purpose; better to add a few more words to clarify behavior.

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?

The tool has no parameters and no output schema, so the description is the sole source of behavioral info. It fails to explain what the agent will receive or how to use the result, leaving the agent underinformed.

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 has zero parameters and schema description coverage is 100%, so schema handles this dimension fully. Description adds no value but is not penalized since baseline is 3 when coverage is high.

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 mentions 'append-only, hash-chained register changelog', which hints at the tool's purpose, but it does not clearly state a verb or functional action (e.g., 'retrieve changelog data'). The phrasing is overly technical and ambiguous, making it hard to distinguish from sibling tools like 'get_history' or 'get_register'.

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?

The description provides no guidance on when to use this tool versus alternatives. With 20 sibling tools including 'get_history' and 'get_register', the lack of usage context or exclusions is a significant gap.

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