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 clear. The description adds the YTD defaulting behavior, which is genuinely useful context, but says nothing about report contents or formatting.

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 short sentences with zero waste, front-loading the core purpose before the defaulting behavior. Nothing could be removed without losing information.

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 low-complexity read-only report with complete parameter docs and full annotations, the essential calling information is present. However, with no output schema, the description does not characterize what the balance sheet report returns, leaving that to the agent's assumptions.

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 coverage is 100%, so the baseline is 3, and the description adds the fallback behavior for dateFrom/dateTo (defaults to YTD when no range is supplied), which is real semantic value beyond the schema's plain type/format entries.

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 (Generate) and resource (balance sheet report) with scope (for a company). It is clearly distinguishable from the financial-statement siblings like get-profit-and-loss and get-cash-flow-statement by name, though it does not explicitly call out the distinction.

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 default-to-YTD note gives some context for how to call it, but there is no explicit when-to-use guidance or routing versus the other report tools (trial balance, P&L, cash flow). Usage is only implied by the report type.

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