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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds useful behavior the annotations don't: results come newest first and can be filtered by operation name. It says nothing about pagination or result volume, which matters for a history listing.

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 compact sentence with the resource and ordering front-loaded before the filter detail. No filler, though it is a fragment rather than a complete statement of behavior.

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?

An output schema exists so return values needn't be described, but with three unspecified parameters and no schema descriptions, the definition leaves the agent guessing about page size and how to continue past the first page. For a paginated history tool this is a meaningful gap.

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 must carry the burden, yet it only clarifies the `operation` parameter (filter by name, e.g. search_free). The `limit` and especially `cursor` parameters are entirely undocumented anywhere, leaving the pagination contract unexplained.

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 names the resource (the account's past calls) and the ordering (newest first), so an agent can tell it apart from list_monitors or get_job. It omits a verb and leaves 'calls' slightly ambiguous (API operation history vs. something else), but the identity of the tool is discernible.

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 or when-not-to-use guidance, and no sibling is named as an alternative. The only implied use case is reviewing past operations, which the agent must infer from the example filter value.

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