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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds useful behavior beyond that — results are ordered oldest first, default page is 50 with a 200 cap, and each change carries who/when/through-what plus old→new values — but the final sentence about ending at 'the current version, to change it at' is ambiguous about whether a version identifier is returned.

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 short and front-loads the core purpose, but the telegraphic phrasing ('through what', 'named where it is now', 'Ends at the current version, to change it at') costs clarity and the last sentence reads as an afterthought rather than structured guidance.

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 output schema, the description carries the burden of explaining returns and largely does so: it names who/when/through-what, old→new per field, ordering, page size, and the OpenAPI breaking-change mode. The only gap is ambiguity about the ending version marker and no mention of how to page further.

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?

Schema coverage is 100%, so all four parameters are already documented, establishing a baseline of 3. The description restates the default-50/max-200 behavior of `max` and hints that `breaking` applies only to OpenAPI docs via 'what breaks first', adding marginal meaning over the schema.

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 states a concrete verb+resource: it returns what changed in a doc (sheet, Slides, board, or OpenAPI) with per-cell/field old→new values. It is clearly a diff/history-read tool, though it never names the sibling `history` tool, which appears to be the closest alternative, so an agent cannot fully disambiguate from the text alone.

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?

Usage is implied by 'after a version, or since a time' and by the `since` parameter accepting either a version or a timestamp, but there is no explicit when-to-use/when-not guidance and no reference to `history` or `get` as alternatives. The agent has to infer selection between this and the sibling history tool.

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