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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavior: results are committed-only, ordered newest first, and paged backwards via a revision cursor. It says nothing about rate limits, page-size behavior, or what happens at the end of history.

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?

Two sentences, no filler, with the core action and ordering front-loaded before the pagination instruction. Every clause earns its place.

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?

An output schema exists so return values need not be described, and annotations cover the safety profile; the cursor semantics are the one thing an agent could not get elsewhere and they are present. What's missing is a note on what a 'changeset' represents or whether sheetId scopes the listing, which would matter for correct invocation.

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 0%, so the description must carry parameter meaning, and it does explain that beforeRevision acts as a backward cursor into older history — useful beyond the bare 'numeric string or null' schema. However, sheetId and limit (including the 1-100 bound) get no semantic treatment, so the compensation is partial.

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?

States a specific verb and resource ('List committed sheet changesets') plus the ordering ('newest first'), which is enough to distinguish it from the singular sheets_get_history_revision. It stops short of naming that sibling explicitly, so an agent must still infer which of the history tools to pick.

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?

'Follow beforeRevision for older history' is a real usage hint that tells the agent how to paginate rather than why to pick this tool. There is no statement of when to use it versus sheets_get_history_revision, sheets_get_version_restore, or sheets_undo/redo, so the routing guidance is only implied.

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