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

No annotations are provided, so the description must disclose behavioral traits. It only states it 'gets' a summary, implying a read operation, but does not confirm read-only behavior, required permissions, or any potential side effects. For a financial data retrieval tool, more transparency (e.g., 'returns historical data, no modifications') is needed.

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?

The description is two sentences, front-loaded with the primary purpose, followed by a targeted usage example. No unnecessary words; each sentence earns its place.

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 no output schema, the description hints at return values (revenue, expenses, net income) but doesn't specify structure or data types. It covers the main use case and parameter interplay adequately, but could mention that the result is a single summary object for completeness.

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 baseline is 3. The description adds value by giving a concrete example ('Feb free cash flow') and connecting the month parameter to single-month queries, which goes beyond the schema. It also hints at the behavior of month vs period without redundancy.

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?

The description uses a specific verb ('Get') and identifies the resource ('P&L summary') with key components ('revenue, expenses, and net income'). It distinguishes itself from sibling financial tools by focusing on the company-level profit and loss summary, making its purpose clear and distinct.

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 provides limited usage guidance: it suggests using the month parameter for single-month queries. However, it does not explicitly state when to use this tool versus alternatives (e.g., get_actuals_vs_budget for variance analysis, get_cash_position for cash flow). It lacks exclusions or prerequisites.

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