Option exchanges

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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is fully covered without description help. The description adds only the content hint (code→name mapping) and no information about enumeration completeness, caching or return shape; with annotations carrying the behavioral burden this is adequate but thin.

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?

A single front-loaded sentence with the resource named first and the usage hint second; no filler, no redundancy.

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-argument static reference lookup with no output schema, the description tells the agent what the rows contain (codes and names) and what they are for. An explicit note that the list is a fixed enumeration would make it fully complete, but nothing essential is missing.

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 takes zero parameters (NoArgs schema), so there is no parameter semantics to document; the baseline for a 0-param tool applies. Nothing in the description conflicts with the empty schema.

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?

States a specific resource (option exchange codes and names) that is clearly a reference-data lookup, distinguishing it from the sibling contract-lookup tools (reference_option_contract(s)) and from the market-data tools. The verb is implicit in the noun phrase, but an agent can still tell what it returns.

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 parenthetical 'to read the exchange columns of option quotes and trades' gives a concrete usage context, which is more than most reference tools offer. However, it names no alternative and gives no explicit when-not-to-use condition, leaving usage implied rather than stated.

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