summarize_privilege_timeline

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and openWorldHint=true, so the safety profile is covered. The description adds useful context about the content categories (gains, revocations, activations, anomalies), but does not disclose behavior such as aggregation logic, date-range handling, or return format.

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 brief and front-loaded with the core purpose, and the parenthetical list efficiently conveys scope. It has no redundant filler, though it could have included more operational detail without becoming verbose.

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 tool with one optional parameter and safe annotations, the description is mostly adequate. However, it omits any mention of the 'days' parameter, does not distinguish itself from closely related timeline tools, and provides no information about what the returned summary contains beyond the category list. Since there is no output schema, a bit more context would be valuable.

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 description coverage is 0%, so the description carries the burden of explaining the 'days' parameter. It does not mention 'days', its meaning, or its effect on the summary. The schema only provides a type and default, leaving the agent to guess that it controls the lookback window.

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 clearly identifies the resource (privilege timeline) and the operation (summary), and it lists the covered aspects: gains, revocations, activations, and anomalies. It does not explicitly differentiate this from sibling tools like list_privilege_timeline_events or export_privilege_timeline_report, but the summarize intent is reasonably clear.

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 gives no guidance on when to use this tool versus the many sibling tools such as list_privilege_timeline_events, get_identity_privilege_timeline, timeline_natural_language_query, or export_privilege_timeline_report. The intended use is only implied by the word 'summary', with no explicit conditions or exclusions.

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