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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It mentions the list is 'comprehensive' and covers 'a wide variety' but does not disclose any behavioral traits such as pagination, output format, rate limits, or required authentication. The read-only nature is implied but not explicitly stated.

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 two sentences but repeats 'COT reports' and uses phrases like 'wide variety of commodities and financial instruments' that add little new information. It is not as concise as it could be, but it is not overly verbose either.

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?

Given the lack of an output schema, the description should clarify what the list contains and how it might be used, e.g., returning report identifiers for use with getCOTReports. The description offers no return structure or examples, leaving the agent uncertain about the output despite understanding the general purpose.

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?

The tool has zero parameters, so the description's role is to clarify what the list contains. It adequately explains that it includes COT reports for commodities and financial instruments. With no parameters to document, this context is sufficient.

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 clearly identifies the resource as a list of available COT reports by commodity or futures contract. It uses 'Access' as a verb, which is somewhat generic, but the resource is specific. It also distinguishes itself from sibling tools like getCOTReports and getCOTAnalysis by emphasizing 'list' and 'overview', though not explicitly.

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?

The description states that this API provides an overview and allows retrieval/exploration of COT reports, but it does not explain when to use this tool versus getCOTReports or getCOTAnalysis. There are no explicit alternatives or exclusions, leaving the agent to infer usage from name only.

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