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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new behavior: a hard 48-hour window, newest-first ordering, an implicit 'published agents only' scope that is not expressible as a parameter, and the fact that each row carries the agent's own rationale. It stays silent on truncation beyond the limit and on whether older history is reachable elsewhere.

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 that leads with the resource and then layers scope, ordering and payload content in order of importance. Every clause carries information; nothing is padding.

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 read-only list tool with no output schema, the description conveys the window, ordering and a key returned field, which is close to sufficient. It leaves unstated what happens when more than 200 trades exist in the window and whether pagination exists at all, a minor but real gap.

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 limit (default 50, max 200), market and agentId all documented inline, so baseline is 3. The description adds no syntax, defaulting or interaction detail for these parameters, and its 'published agents' scoping is not a parameter at all, which could momentarily confuse an agent looking for a corresponding field.

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?

Names the specific resource (trades), the population (published agents), the window (last 48 hours) and the ordering (newest first), so the agent knows exactly what it is getting. It lacks an explicit verb such as 'list' and doesn't name a sibling, but the sibling set (get_agent, get_market, list_agents, list_markets) covers entirely different resources, so ambiguity is low.

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?

Usage is implied rather than stated: the 48-hour window and newest-first ordering suggest a browse/monitor use case, and the description implies that narrower lookups should use market/agentId filters. There is no explicit when-to-use vs when-not-to-use statement and no mention of the limit ceiling, so the agent must infer routing.

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