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

No annotations are provided, and the description does not disclose behavior beyond the vague 'Free discovery'. It doesn't explicitly state read-only/safe usage, return format, or any constraints. The term 'free' is ambiguous (cost vs. unrestricted).

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?

Single sentence, front-loaded with a clear label, no redundancy. The colon-separated list efficiently enumerates the catalog dimensions.

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, the description covers the core aspects of the catalog but leaves ambiguity about 'pricing' and the exact nature of the output. Without an output schema, it should ideally state what the agent will receive (e.g., a list of available symbols/timeframes). Still, it's adequate for a basic discovery tool.

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 no parameters, so the description has no parameter semantics to add. Schema coverage is 100% (empty object), and baseline for 0 params is 4.

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 identifies the tool's scope (symbols, timeframes, ranges, pricing, quality legend) and distinguishes it from data retrieval siblings by focusing on catalog metadata. However, 'Free discovery' as a verb phrase is vague; a more explicit verb like 'Lists available' would clarify.

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 on when to use this tool vs alternatives. It does not explicitly state that this is a starting point for exploring available data before querying specific tools, nor does it name any sibling tools as alternatives.

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