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

The annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds only that actor identity is included; it says nothing about ordering, time window, retention, activity types, or how pagination behaves.

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?

A single well-formed sentence with no filler, and the scope is front-loaded. It is efficient, though efficiency here partly reflects how little is disclosed.

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 three undocumented parameters, no output schema, and cursor pagination, an agent needs to know ordering, page-size behavior, and what an "activity" record contains. The description plus annotations leave those gaps unfilled.

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% for three parameters (limit, cursor, project_id), so the description must compensate and does not. Only "across the account and its projects" loosely implies project_id scoping; limit's cap of 100 and cursor-based pagination are never mentioned.

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 gives a concrete verb and resource ("reads what happened") plus scope ("across the account and its projects") and actor information ("who did it"). It is clear what the tool returns, but it never differentiates itself from close siblings such as list_audit_events, get_collection_changes, or list_notifications.

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?

There is no explicit when-to-use guidance and no alternative named, despite several sibling tools that plausibly overlap (list_audit_events, list_notifications, get_collection_changes). Usage is only inferable from the word "activity" itself.

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