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

No annotations are provided, so the description carries the full burden for behavioral disclosure. It reveals that the tool is free and lists data, but it does not state whether it is read-only, whether there are rate limits, pagination, or if any authentication is required. 'Free' is the only extra behavioral trait, which is insufficient for full transparency.

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 succinct sentence that front-loads the primary action and details. Every word earns its place, and there is no redundant or vague filler.

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 simple list tool with no parameters and no output schema, the description is largely complete: it names the tool's output fields and a key characteristic (free). However, it does not explicitly state the output format (e.g., array of objects) or any sorting/pagination, which would make it fully self-contained. Given the low complexity, this is an adequate score.

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?

With zero parameters, the schema is empty and the baseline is 4. The description adds value by specifying the output fields, which clarifies what the empty call returns. Although no parameter details are needed, the description does not contradict or mislead about parameters.

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 uses a specific verb ('List') with a clear resource ('all covered tickers') and enumerates the exact fields returned (company name, sector, exchange, last updated date). This clearly distinguishes it from the sibling tools which focus on detailed research, primers, or requests for coverage.

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 implies the tool is used to see which tickers are covered, but it does not explicitly state when to use it versus alternatives like search_research or request_coverage. There is no mention of exclusions or context. The 'Free' hint weakly suggests cost/capability context, but not enough to be considered clear guidance.

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