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

Annotations already establish readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds that returned venue names are the canonical spelling accepted by sibling tools, plus a field inventory, but says nothing about data freshness or caching.

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?

Two sentences, front-loaded with the resource and its returned fields, and the closing interop note is short and high-value. The field enumeration is dense but each item earns its place; no filler or repetition.

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?

With an output schema present, the description does not need to document return shapes, yet it gives a compact summary of the fields and clarifies the exchange-name contract used by other tools. The only gap is the absence of guidance on when this reference lookup is the right call versus its siblings.

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?

Schema description coverage is 100%, with each of the four optional filters (q, sort, has_spot, trading_enabled) already documented including defaults and enum-like sort values. The description contributes no parameter detail, so the baseline of 3 applies.

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 names a specific resource ('The venues Arbitron serves') and enumerates exactly what each record carries — instrument counts, max leverage, taker fee, spot presence, contract specs and funding links. It is clearly separable from siblings like arbitron_get_listings, arbitron_get_spreads, or arbitron_search_coins, though it never uses an explicit verb.

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?

It implies usage as the venue-reference lookup and adds one genuinely useful interop cue ('The exchange field is the spelling the other tools accept'), which tells an agent this output feeds other calls. However, there is no explicit when-to-use statement, no alternatives named, and no note on when to prefer search_coins or get_listings instead.

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