get_account_overview_chart

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only states 'Get balance trend charts.' It does not specify whether the result is chart data, an image, a URL, or how the start/end parameters affect the output. The read-only nature is implied by 'Get' but not explicitly confirmed.

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 a single short sentence with no wasted words, so it is concise and front-loaded. However, it is under-specified rather than appropriately sized; a bit more detail about the chart type or parameters would make it more useful without bloating it.

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?

The tool has two required parameters, no output schema, and no annotations, yet the description provides only a five-word summary. An agent cannot correctly invoke this tool because it lacks critical information about parameter formats, return structure, and scope (e.g., per-account vs. all accounts).

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 input schema provides only 'start' and 'end' as strings with no descriptions. The description does not mention or explain these parameters, so an agent cannot determine expected formats (e.g., date vs. timestamp) or semantics.

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 states a specific verb ('Get') and resource ('balance trend charts'), making the primary purpose reasonably clear. However, it does not differentiate itself from sibling summary tools like get_net_worth_summary or get_spending_summary, so it lacks explicit sibling distinction.

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 guidance is provided about when to use this tool versus alternatives. The description does not mention prerequisites, intended use cases, or exclusions, leaving the agent to infer context from the name alone.

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