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

Annotations already declare readOnlyHint/idempotentHint/non-destructive, and the description reinforces the key safety fact ('nothing is placed') plus adds real context: which venues are consulted, that the user's own exchange is only included when connected, the best-net-output selection rule, and 'no key needed.' It stops short of describing response shape or latency.

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?

Front-loads the verb and read-only guarantee in the first clause, then splits crypto vs. non-crypto behavior into clear parenthetical statements. Dense but every clause carries information; the parenthetical nesting makes it slightly harder to scan.

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?

No output schema, but the description conceptually explains what comes back (the best-net-output quote, or the vehicle's own setup/trading page) and covers the read-only contract and credential requirement. Adequate for a 3-param read 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?

Schema description coverage is 100%, so the schema already documents symbol (board symbol formats or specialist agent name), usdc_amount and conversation_id. The description reinforces the vehicle-type dimension but adds no syntax or format detail beyond the schema, so the baseline 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?

States a specific verb (ROUTE) and a specific resource (one board vehicle), then spells out the two distinct behaviors: a cross-venue crypto quote vs. returning a non-crypto vehicle's own setup. This lets an agent distinguish it from theme_journey_trade_vehicle without opening the schema.

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?

Explicitly names the alternative and the condition that selects it: 'nothing is placed; theme_journey_trade_vehicle places it after confirm_action.' It also segments usage by asset class (crypto vs. card/theme/stock/fund/WTA). It does not address overlap with the similarly named theme_journey_route sibling, so a 4 rather than a 5.

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