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

readOnlyHint=true already tells the agent this is a safe read, and the description is consistent with that. It adds the pagination mechanism ('page_token pagination') and the endpoint mapping, which is genuine operational context, but omits ordering, default page size, and any scoping/permission caveats for audit data.

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 compact sentences with the purpose front-loaded ahead of filters and pagination. The trailing 'Lambda Cloud REST: GET /api/v1/audit-events' is useful for API-native agents but is arguably redundant metadata rather than task guidance.

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?

No output schema exists, so the description bears some responsibility for explaining what an audit event contains or how results are ordered/limited, and it does not. Given the tool is a simple read-only list with fully described parameters, it is adequate but not complete.

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 100%, so all four parameters are already documented in the schema, including the ISO 8601 format and example resource types. The description only restates the filter intent, adding no syntax or constraint beyond the schema — the baseline 3 is correct.

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+resource ('List account audit-log events') with scope qualifiers (time window, resource type) and even names the underlying REST endpoint. No sibling tool covers audit events, so it is unambiguously distinguishable from the list_filesystems/list_instances family.

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 implies usage via 'optionally filtered by time window and resource type', so an agent can infer that filters are optional. However, it names no alternatives, no when-not conditions, and no prerequisites (e.g. permission scope needed for audit logs).

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