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

Annotations already declare the operation is read-only, idempotent, non-destructive, and closed-world. The description adds no further behavioral context such as required permissions, date-scope behavior, aggregation rules, or pagination, though it does not contradict the annotations.

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 text is short but wastes its opening by repeating the endpoint path twice. It is front-loaded with a redundant path rather than a meaningful statement of purpose or usage.

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 dashboard breakdown endpoint with no output schema and no parameter documentation, the description does not explain what data is returned, what breakdown dimensions are available, or how to filter results. It is not sufficient for an agent to invoke the tool correctly beyond knowing the HTTP path.

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%, and the description provides no information about the query or params objects. With two undocumented parameters and a nested generic query object, the description completely fails to compensate for the schema gap.

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 merely repeats the endpoint path twice and adds an operation ID. It implies the tool relates to dashboard expense breakdown, but it does not state a clear action or distinguish this from sibling dashboard tools such as expense trends or status breakdown.

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 guidance on when to use this tool, when not to use it, or which alternative dashboard tool to choose. The only instruction points to describe_operation for request schemas, which is not usage guidance.

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