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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. Since no output schema exists, the description usefully carries the return-value burden by enumerating the summary contents. It adds nothing about the superadmin auth requirement for customerId or rate/cost behavior, keeping it short of a 5.

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?

Front-loaded with the core purpose in the first sentence, with supporting detail second. The trailing quoted questions are somewhat redundant with the listed contents but serve intent-matching, so the description stays tight overall.

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?

For a two-parameter, zero-required, read-only aggregate tool with no output schema, the description supplies the return-value summary an agent would otherwise lack. What is missing is sibling disambiguation and any note on how `days`/`customerId` scope the result, but the essentials for calling it correctly are present.

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%, with both `days` (lookback, max 365) and `customerId` (superadmin only) fully documented inline. The description contributes nothing beyond the baseline about parameters, so the standard baseline of 3 applies.

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 resource and scope: a cumulative impact summary across all deployments, listing exactly what it contains (fixes shipped, issues resolved, failure reduction, before/after example). It is clear and concrete, but it never names a sibling (e.g. get_deployment_impact or get_fleet_overview) to differentiate this aggregate view from the per-deployment or fleet views.

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 quoted user questions ('how is Converra helping?', 'show me the impact') imply when the tool is appropriate, which is useful intent-matching. However there is no explicit when-not guidance, no mention of the alternatives (get_deployment_impact, get_fleet_intelligence), and no note that days/customerId change the scope of what is returned.

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