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

Annotations already indicate readOnlyHint, idempotentHint, and openWorldHint. Description adds context on what the tool returns (health states, capability flags, routing config). No contradictions; consistent with read-only, safe operation.

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 concise sentences front-loaded with key information: 'Health + capabilities of every perps venue, plus routing config.' followed by enumerated details. No redundant or superfluous text.

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?

Given zero required parameters and comprehensive description of output fields, the tool seems complete. However, it doesn't mention potential pagination or if the list of venues is exhaustive. Still, for a read-only aggregate status, it's sufficient.

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 coverage is 0% (no description for caller_id). Description does not explain the optional caller_id parameter or its effect. With low coverage, description should compensate but fails to add meaning to the parameter.

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?

Description clearly states it reports health and capabilities for all perps venues, listing specific fields like primary/fallback venue, routable venues, per-venue health states, and custody tier. This distinguishes it from siblings like get_venue_health which may be more specific.

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?

Description implies usage for getting comprehensive venue overview but does not explicitly state when to use or when to use alternatives like get_venue_health or get_all_venues_status. No prerequisite or exclusion conditions are mentioned.

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