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

Annotations already declare destructiveHint=true, openWorldHint=true, and idempotentHint=true, so the safety profile is covered. The description adds no behavioral context — it doesn't mention that sources and prior-agent context are sent to an external inference provider (a consent gate exists in the schema) or that the operation is destructive/non-free. It does not contradict annotations, but contributes little beyond them.

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 well-formed sentence with no waste, but it is under-specified rather than concise — for a 6-param, nested, destructive, open-world tool one sentence leaves too much unstated.

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 a nested object, external-processing consent requirement, destructive/open-world annotations, and no output schema, the description is too thin. It doesn't explain return format, the external-send implications, or the two distinct modes (deal vs QBR board update) that the schema hints at.

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 67% with a nested inputs object, and the description adds nothing about the parameters (mode, currency, savingsType, fxEvidence, consent gate). It fails to compensate for the undocumented third of parameters or clarify how dealRecords/qbrInputs map to the two output types.

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 and output (turn deal results/performance data into a finance-reviewable savings report or board update), so the agent understands what it produces. It doesn't differentiate from the many sibling procurement/analysis tools, but the resource and deliverable are clear.

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?

No when-to-use vs alternatives guidance; nothing says when to pick this over xcash-working-capital, finance-business-case, or the report-producing siblings. The only implied context is 'when you need a finance-reviewable savings or board deliverable', with no exclusions or prerequisites.

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