recharge_month

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

The annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so 'Read-only' merely restates structured data rather than adding anything. No further behavioral context (auth, rate limits, error conditions) is disclosed, so the description contributes little beyond what the annotations already carry.

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 that are front-loaded with the operation and scope. Efficient and wasted little space, though 'Read-only' duplicates the annotation and thus doesn't earn 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?

An output schema exists, so return values needn't be spelled out, and the tool is simple with one parameter. Still, the lack of any differentiation from the recharge_* siblings leaves a real gap for an agent choosing among twenty tools.

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 0% for the single month parameter, so the description carries the burden of clarifying it. The 'YYYY-MM' hint usefully specifies the expected format beyond the bare 'string' schema, but no further detail (valid ranges, timezone, etc.) is given, so it only partially compensates.

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 clear verb (Return) and resource (recharge data) scoped to a month, so the basic operation is unambiguous. However, it does nothing to distinguish itself from siblings like recharge_history, recharge_detail, or account_month_amount, leaving the agent to infer which recharge tool applies when.

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 alternatives, no prerequisites, and no exclusions. The description offers only what the tool returns, not the context that would select it over its many siblings.

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