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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds one genuine behavioral detail not in the structured data — results are ordered newest first — but says nothing about pagination behavior or how far back the history extends, which is relevant given the openWorldHint.

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 sentence with no filler, and the most useful information (what the records represent) is front-loaded. It is slightly fragmentary — no explicit verb — but nothing in it is wasted.

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 simple three-parameter read-only list tool with full schema coverage, the description conveys the conceptual content of each record, which is the main gap when no output schema exists. It stops short of describing record fields (amount, date, transaction type) or history depth, so it is adequate but not fully self-sufficient.

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%: page, limit, and project_id are all documented in the schema, including the default and max values and the pointer to dosai_list_projects. The description adds no additional meaning about any parameter, so the baseline of 3 applies.

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 names the resource (balance history) and its contents — spend events and top-ups — which is more informative than the title alone. However, it never uses a clear verb like 'list' or 'retrieve', and it does not distinguish itself from adjacent money tools such as dosai_get_balance, dosai_get_money_by_day, or dosai_list_invoices.

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?

There is no statement of when to use this tool versus dosai_get_balance (current balance) or dosai_get_money_by_day (aggregated spend), nor any prerequisites or exclusions. The 'newest first' ordering is the only usage-relevant cue, and it is about result shape, not tool selection.

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