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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the date-bounded scoping and the distinction between activity types and object events, which is useful behavior context, though it leaves details like pagination and grouping to the schema.

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 operation front-loaded and the conditional routing rule in the second sentence. Every word 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?

The tool is complex (29 params) and the description is minimal, but the schema carries detailed parameter semantics and an output schema exists, so return-value documentation isn't required. The description gives the essential orientation an agent needs before reading the schema, though a sentence about grouping/filtering would have made it more self-sufficient.

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?

Only 41% of parameters have schema descriptions, so the top-level description needs to compensate, but it only gestures at engagement_type choices and 'association filters.' It does not explain the required date_range shape, the selector semantics of owner_ids/team_ids, or the grouping/pagination parameters, leaving a large gap.

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 ('Return') and resource ('date-bounded activities or deal/lead CRM object events'), and it distinguishes between activity records and dated object events. It does not name or contrast sibling tools explicitly, so it falls just short of full differentiation.

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 a clear context for the tool—retrieving date-bounded activities or object events—and provides an explicit routing rule: for deal/lead-associated activities, choose meetings/calls/emails/communications and pair them with association filters. It does not state exclusions or name alternative tools, but the primary use case is clear.

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