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

The annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds useful context about the change categories returned and the fact that each change has an id, which matters for follow-up actions. It does not describe pagination or ordering beyond 'recent'.

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 two sentences with no filler. It front-loads what the tool lists and follows with the concrete use case, making it easy to scan.

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 simple list tool, the description covers the main content and the reason to call it. Annotations cover the read-only nature and the schema covers the limit parameter. Since there is no output schema, the description could say more about the return structure beyond ids, but it is largely sufficient 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?

The input schema has 100% description coverage for the single limit parameter, so the schema already carries the parameter meaning. The description adds no additional semantics about the limit. A baseline 3 is appropriate when schema coverage is complete and the description is silent on parameters.

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 uses a specific verb ('List') and resource ('recent changes to the owner's Google profile'), and it enumerates the relevant change types: pending drafts, published changes, failures and undos. The use-case phrasing distinguishes it from action siblings like publish_change, discard_change and undo_change.

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?

It clearly states when to use the tool: to find a draft to publish or discard, or a published change to undo. That gives strong context, but it does not explicitly name the action tools as alternatives or state when not to use it.

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