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

With no annotations, the description carries full responsibility for behavioral disclosure. It describes the API's general capabilities rather than the tool's specific behavior, omitting return format, rate limits, or the fact that no parameters are accepted (though the schema shows this).

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 first sentence is direct and useful, but the second sentence adds vague marketing language ('comprehensive overview', 'further analysis') without actionable detail. It could be tightened to a single sentence without losing meaning.

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 zero-parameter tool with no output schema, the description should clarify what the returned list contains (e.g., exchange codes, names, market identifiers). It only says 'complete list', leaving the response structure and any usage context ambiguous.

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, which typically yields a baseline score of 4. However, the description misleadingly states that users can 'filter data by specific exchanges', implying a parameter that the schema does not support. This reduces clarity.

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 states the tool accesses a complete list of supported stock exchanges, which is a specific resource. However, it does not explicitly differentiate itself from sibling list tools like getAvailableCountries or getAvailableSectors, though the resource is distinct.

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 explicit when-to-use or alternative guidance is provided. The phrase 'for further analysis' implies a use case, but it does not specify when to choose this over other exchange-related tools such as getAllExchangeMarketHours or searchExchangeVariants.

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