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

Annotations already declare this a safe read (readOnlyHint=true, destructiveHint=false), so the safety burden is lifted. The description adds useful content-level context about what is aggregated and that it surfaces a before/after example, but says nothing about scope of the aggregation window beyond the schema, permission requirements, or freshness/caching of the numbers.

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 tight sentences with the aggregate payload front-loaded. The trailing example-question list is mildly redundant with the preceding enumeration but still earns its place as invocation cues.

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 read-only, zero-required-parameter tool with no output schema and full schema coverage, the description adequately conveys what the response contains. It is complete enough to call correctly; only the relationship to sibling impact/fleet tools is underspecified.

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%: days (lookback, default all-time, max 365) and customerId (superadmin only) are fully documented in the schema. The description adds no additional parameter meaning, so the baseline of 3 is appropriate.

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 concrete verb and resource — a cumulative impact summary across all deployments — and enumerates the payload (fixes shipped, issues resolved, failure reduction, before/after example). An agent can distinguish it from per-deployment siblings like get_deployment_impact, though it never names any alternative directly.

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 trigger questions ('how is Converra helping?', 'what was fixed?') imply when to reach for this tool, which is a real hint. However, there is no explicit when-not guidance and no routing between this and related read tools such as get_deployment_impact, get_fleet_intelligence, or get_fleet_overview.

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