compare_activities

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

No annotations are provided, so the description carries the full burden. It adds a useful output nuance ('each metric range states how many reported a value'), but it does not explicitly state that the operation is read-only or disclose any other behavioral traits. The comparison is implicitly safe but not stated.

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 entire description is a single front-loaded sentence with no filler. It packs the core action, the resource bound, and a key output interpretation detail into minimal space.

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?

Given the low complexity (one array parameter) and the presence of an output schema, the description covers the essential scope and an important output nuance. The only notable absence is explicit sibling differentiation, which is not critical for this simple tool.

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 schema provides zero description coverage for activity_ids, so the description must compensate. It implies the array-length constraint (2-10) but does not explain what the IDs refer to or any formatting expectations; the meaning relies heavily on the parameter name.

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 states a concrete operation ('Compare') on a bounded resource (2-10 activities), which is specific enough to distinguish it from sibling get_activity/get_activities tools. The count range adds precision beyond a generic 'compare activities' phrasing.

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?

Usage context is only implied: the plural comparison semantics suggest choosing this over get_activity/get_activities, but there is no explicit when-to-use or when-not-to-use guidance. An agent must infer the selection criteria from the tool name and siblings.

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