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 without description help. The description adds one useful behavioral fact — that the output is a derived/aggregated view built from the P&L v2 report rather than raw ledger data — but says nothing about latency, computation caveats, or what the summary includes.

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 front-loaded sentence with zero filler — the verb and resource lead immediately. It is efficient, though its brevity is partly achieved by omitting information rather than by tight editing of necessary content.

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?

There is no output schema, so the description carries the full burden of explaining what the returned 'revenue summary' contains — and it does not. For a read-only reporting tool whose entire value is the shape of its output, leaving the return contents and the period/date-range interaction undocumented is a significant gap.

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 75% and the schema already documents dateFrom, dateTo, and the period enum clearly. The description contributes no parameter meaning at all, adding nothing about how period interacts with the explicit date range, which is the one ambiguity an agent might hit.

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 (get) and resource (revenue summary) and grounds it in an underlying report, 'the profit and loss v2 report,' which loosely distinguishes it from the sibling get-profit-and-loss-v2. However, 'founder-friendly' is vague marketing framing that does not say what the summary actually contains or how it differs in scope from the raw P&L.

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, when-not, or alternative guidance is given. The mention of the P&L v2 report hints this is a simplified alternative to get-profit-and-loss-v2, but nothing tells the agent which tool to pick or under what conditions.

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